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Thursday, November 25, 2021

Amazon Flex Courier Driver flexibility

 Amazon Flex


Courier Driver flexibility - Earn extra weekly - Competitive rates - amazon.com.sg


Start driving and earning today.

Making quicker progress towards your goals starts with downloading the Amazon Flex app.

Download App: https://flex.amazon.com.sg/lets-drive


This is how Amazon Flex works.

First, reserve a block.

Once you’ve downloaded the app, set up your account, and passed a background check, you can look for delivery opportunities that are convenient for you. Open the Amazon Flex app to search for available delivery blocks in your area. With every offer, you’ll see your expected earnings and how long your block is likely to take you to complete.


Next, make your deliveries.

The day of your block, head to your designated Amazon location to pick up your packages. Then, using the Amazon Flex app, navigate to each destination, deliver the package that corresponds with that address, and deliver smiles wherever you go.

Lastly, get paid and enjoy life.

Once your deliveries are complete, there’s nothing else for you to do but get paid. Amazon Flex pays via direct deposit once a week, and you can track your payments in the Earnings section within the Amazon Flex app.


Ready to drive with Amazon Flex?

This is what you need to get started.


Live in Singapore where Flex operates.

We operate in Jurong East and Benoi Sector, Singapore.

Be 18 or older.

You must be at least 18 to be a delivery partner.

Have a valid Singapore driver’s licence.

You need to be a Singapore permanent resident or citizen and have a valid Singapore driver’s licence.

Have a mid-sized or larger vehicle.

Most deliveries require a 4-door, midsize sedan or larger vehicle (like an SUV, van or truck with a covered bed).

Have an iPhone or Android smart phone.

Find more details about Android requirements here.

Pass a background check.

All delivery partners must pass a background check.



Wednesday, November 24, 2021

COUNSELLING PRACTICES FOR SPECIAL NEED POPULATIONS

COUNSELLING PRACTICES FOR SPECIAL NEED POPULATIONS

BY 

DR MALAMI UMAR TAMBAWAL EDUCATIONAL FOUNDATIONS UNIT FACULTY OF EDUCATION AND EXTENSION SERVICES USMANU DANFODIYO UNIVERSITY, SOKOTO.


Abstract 

The paper discussed the need for change of approach for counselling services from the hitherto school setting, to a more generalized view of the whole fabric of the society thereby limiting its scope to special need populations who by the nature and peculiarity of situations demand a specialized approach in order to resolve their psycho-social and academic problems. The task of counselling as observed in this paper, therefore, is giving the individual the opportunity to define, explore, discover and adopt ways of living a more satisfying and resourceful life within the social, educational and vocational groupings within which he or she identifies or finds him/herself. The paper examined the counselling needs of a segment of the special population viz: the Youth, Drug Abused, Handicapped/physically challenged and retirees, and preferred certain strategies for counselling such groups. Recommendations were also given for meeting the challenges counselling faced in order to address the issues of the populations such as that. Such that the Counsellor based training Curriculum in our Universities and Colleges of Education should be broadened and enlarged, so that trainees would come to terms with the specific needs of counselling clients with special problem during practical attachments. The paper concluded by employing the Counselling Association of Nigeria (CASSON) to brace up and face the enormous challenges of Counselling the special need populations. 


Introduction 

Counselling outside the school setting is receiving increased attention globally because of the existing complexities of life ranging from urbanization, globalization and technological break through which is bringing a lot shift in people’s way of life either by way of job creation and adaptation to it or by way of living in urban and rural areas. Individuals today face a lot of challenges some are natural, or through illness and accidents or as a results of man’s innovation and creation, thus making them to require a special assistance in order to cope with demanding situation in which they found themselves. Counselling which is aimed at helping individuals to resolve critical life issues can be at hand to see how such groups could be assisted. The growing economic hardships of our times, unemployment problems, health related issues, growing demand for accommodation by individuals, the traumas of political and religious upheavals all make certain people fall into some anxieties that may lead them to require special attention and thus in turn make them special population. The thrust of this paper is to identify some of these groups and come up with the appropriate counselling strategies that can be used to assist them. Yakubu (2000) asserted that a special population is any group of people identified with certain empirical evidences or features that distinguished them from the normal persons. These make them “a special population” that are cannot help admiring them in a special way, due to the features that make them strange from all others. It should however, be noted that the features do not only involve negative qualities but also positive ones. Anything that makes one look or behave different from others make one a special. Counselling is viewed as a personalized, intimate interview or dialogue between a person experiencing some emotional, social, educational, physical, and vocational problems and a professional counsellor. It can also be seen as a service that helps individual to solve problems and learn to cope with these problems that are not easy to solve. This is why the special needs population can be focused so that they are assisted out of their needs. Counselling is designed to remove the emotional, psychological and personal social roadblocks placed in the way of an individual by the multidimensional problems of the day to day life.  

The involvement of counselling with special population therefore is to improve and possibly remedy the challenges, facing people with special needs. The educational challenges facing these category of people are quite obvious and they need new strategies in resolving through counselling. This is because according to Ipaye (1981), the individual learns new ways if interacting, new ways of obtaining information, new ways of making decisions, and new ways of responding to the environment and new ways of interacting. The task of counselling therefore as seen by Ipaye (1981), Denga (1990), Mallum (1983), Okon (1983), Akinboye (1982) and Bulus (1989) is to give the individual the opportunity to define, explore, discover and adopt ways of living a more satisfying and resourceful life within the social, educational and vocational groupings within which he or she is identified or finds himself or herself. The challenges of life has made some people feeling as not existing well, but through education as a tool for moral, social, economic, political and technological development, has affected some changes in human lives and the society as well. Human communities have used education to improve their standard of living, develop new methods and skills of production, so is the need of counselling practices for special need populations. 

Special Need Population 

Depending upon the context one wishes to stand, the earlier definition which states that special population is any group of people identified to be different from other people, is adopted in of this paper. 

Yakubu (2000) presented the following as special need population: (1) Drug abused (2) Handicapped (3) HIV/AIDS patients 5 (4) Stressful and anxiety patients (5) Retirees (6) Widows and widowers (7) The women (8) The Adolescents (9) The negative self concept people (10) The Nomads (11) The unemployed (12) The orphans (13) The riverine people (14) The prisoners, etc. 

However, Bulus (2009) also identified the following as special need population: (1) Marital and family segments (2) Women (3) The aged (4) Exceptional persons (5) Youths (6) Victims of crises (7) Workers (8) Persons requiring rehabilitation and reintegration. 

Having seen the varied views on special populations, this paper focused on the following, which does not exhaust the groups but for convenience of presentation. 

The groups are: The Youths, Drug Abused, Handicapped/Physically challenged, and retirees. 

The Youths. 

Carew (2009), opined that, the youths constitute a fairly good size of the national population. The characteristics of the youths and the need to effectively serve them make it imperative for counsellors to respond to their concerns. Psychologists and sociologists generally agree that the period of youth is characterized with high demonstration of energy, zest and unrest. In line with this, Bulus (2009) stated that, issues surrounding the youths include: choice of friends, consequences of complex changes in society, unemployment, drug addiction, cultism, examination malpractices, consequences of physical, emotional and psychological changes etcetera. Counsellors would need coping skills to meet the youth desires and aspirations. They require personal counselling for all the concerns to make wise rational and scientific lasting choices/decision by the society. The youth that fall into the category of special population can be identified as the Area Boys, militant youth of Niger Delta and creeks, the religious fanatics, the truants and drug abused. The area boys are most often used by politicians for political campaigns and vote rigging and thereby discarded after elections to cause havoc to members of the general public. The militants for social and economic reasons rake havoc in the Niger Delta thereby causing shortfall in Petroleum products activities which affects Nigeria’s international trade and power production in the country. Some unpatriotic Nigerians and misguided individual here used youths to create religious crisis, especially in the Northern part of the country. The repercussions of such religious crisis have turned out to be expensive in terms of human lives and property. The social and psychological damage cannot be quantified. Some of the indicators of crisis among youth as opined by Nwakaibie (2006), are sexual promiscuity, drug abuse, cultism, amorality and behavioural disorders that have reached alarming proportions and demand counsellors paying attention to them. It is in this regard that Denga (2009) opined that counselling psychology is replete with behavioural contingencies that can be used to modify maladaptative behaviour, chronic frustration, misplaced aggression, excessive love for cupidity (or money) and other assorted or variegated cargo of criminal behaviours. 

In order to modify maladaptive behaviour, Lar, Okpede and Bulus (1992) suggested the following techniques: 1) Negative Reinforcement: This involves punishment for exhibiting unwanted behaviour. It ranges from painful physical stimulation and deprivation to weaker reinforcer such as verbal criticism, hostility or simple expression of dislike. 2) Positive Reinforcement: This means rewarding people for exhibiting a specific wanted behaviour. 3) Extinction: 

This is otherwise referred to as the ignore technique in counselling, it is used to refer to the process of returning a behaviour to its original or pre-reinforcement level. It also connotes the gradual elimination of a new response through rewards of the reinforcers. 4) Shaping: This involves initiating planned changes in another’s behaviour and actually keeping track of the progress and positively reinforcing those behaviours that begin to appropriate the desired end product more and more. 5) Modelling: This refers to the process whereby elaborate sequences or complex sets of behaviours are initiated. It involves a situation where people who do not know how to act have to rely on others around them, imitating their behaviours. 6) Response Cost Technique: This involves making an individual to loose or forfeit something that is of value to him/her as a result of a negative/unwanted behaviour. 7) The Time our Technique: This involves the removal of offender from a reinforcing environment and situation to a non reinforcing environment and situation where he is to stay alone for a while to pay for his behaviour. 8) Systematic Desensitization Technique: This involves helping people who manifest fear in the presence of certain objects or persons and incidences. These techniques can also be applied to other specialized populations. 

Drug Abused 

The youths are the most vulnerable group of drug abuse; therefore there is need for an understanding of why many youths have the need to abuse drugs, which would go along way in counselling them. The following were identified by Yakubu (2000) as the possible causes of drug abuse: (1) The drive towards modernization (2) Excessive use of drugs made or induced young ones to experiment as well. (3) Seeking of pleasure (4) To help cope with personal problems and psychological stress. (5) Young ones trying to protest against norms imposed on them by the society. (6) Increase in international contacts as to imitate life styles (7) Social factors such as peer influence. (8) Poor self-image and frequent experience feelings of lack of selfesteem. (9) Marital disharmony, family stress and the break up of families are important factors. (10) The desire to achieve in a competitive world like the case of Diego Maradona in USA 1994. (11) Ignorance (12) Mass media. It can be noted from the above that, there is no single causes of drug abuse. It is however generally agreed that certain reasons for abuse are important, such as availability of drugs, a vulnerable personality and social pressure. 

According to Abayemi (1990) many drug users, particularly adolescents taking non-prescribed drugs appear to have personality disorder before taking drugs as shown by poor school record, truancy, delinquency and dropout. Such drug-abusers often seems to be without resources to cope with the challenges of day-today life, They are inconsistent in their feelings and critical of society and authority; some drug abusers give a history of mental illness or personality disorder in the family, or they come from severely disorganized background. Abayemi (1990) opined that a history of childhood unhappiness is common among drug abusers. Drug abusers are prone to many social and psychological problems, for according to Oladele (2007) in many cases, individuals not only break the law by obtaining their drugs, but engage in illegal activities to obtain money needed to buy the drugs. He can also create illegal network of channels for drug distribution and sale. The individual dependent on drug often makes the acquisition of drugs a way of life, living little time for work or school. Drug abuse poses the greatest threat to the health and survival of mankind. 

For instance, alcohol can cause liver disease, like cirrhosis, 10 hepatitis and cancer. Many drug abusers die of HIV/AIDS. Many of the HIV – positive population are drug users who injected themselves with infected needles. Many babies born are exposed to illicit drug while in the womb. Such children suffer damaging effects both mentally and physically and painful withdrawal symptoms. Drugs have destroyed several homes. Parents who crave for drugs rarely provide for their children with a stable and loving home. Children who grow in environment where drugs users live take to the streets as “area boys” or street urchins or even get involved in drug themselves. Often people involved in drugs are responsible for crimes such as mugging, armed robbery, murder, drug trafficking, and increased risk of homicide and prostitution. 

The counselling strategies that can be employed for drug abused individuals or groups should include the following: (a) confrontation (b) accurate education (c) assertiveness training (d) decision making strategies (e) Peer cluster involvement (Adegoke, 2003:72). 

Handicapped/physically challenged 

The handicapped/physically challenged according to Carew (2009) consist of physical, social, psychological, mental and economic individuals who deviate from the normal population. The term challenged have been interchangeably used with disadvantaged or handicapped for whom special education should be provided. Some times the term “exceptional” individuals, is used for special education and in that case the gifted and talented consist of this categorization. The challenged group of individuals  (especially in the school system) are those that would need special education because their abilities, emotionality, mental, behavioural and social characteristics are different from the normal population (Mba 1991). 

The categories into which individuals that are handicapped or physically challenged include: (1) the hearing disabled, (2) the mentally retarded (3) The physical and health impaired. (4) The speech and hearing – impaired (5) The visually – impaired (6) Children with behaviour disorders (disturbed hearing behaviour) (7) The gifted and talented, Individuals with one kind of disability or the other needs special kind of attention in order to fit into normal life with the generality of the population in terms of adjustment and information. 

In line with this Nwoye (1998), asserted that, the counsellor should however remember that they need the adjustment and informational services at two basic levels: namely those to be given to them directly and those to be given to them indirectly through their parents, the peers, their teachers and their potential employers. In counselling the physically challenged directly, the first thing to do for them is to help them adjust their minds and feelings to the meaning and implications of their challenged conditions. 

To help them in this regard the counsellor needs to apply much of his professional counselling skills such as that of empathy, rapport building, and adequate cross-checking of feelings, effective communication and unconditional positive regard. To be able to use these skills in counselling the physically challenged, the counsellor needs first of all to get his cognitive field sufficiently 12 broadened concerning the nature and implications of the different categories of challenging conditions. And this implies that he needs to read a lot concerning the needs and problems of the various challenging conditions so as to be able to gather enough relevant information that might help him to be able to correct in good time any prior misconceptions he may be entertaining concerning the various individuals challenged by one specific disability or the other. 

Helping a physically challenged client to adjust to his condition requires giving him counselling on how to plan an effective strategy for improving his other positive aspects of self and then helping him to determine how to manage most of his existing challenging conditions so as to help him control as much as possible, the obstacles they can present to his progress in life. The informational strategy that could be employed for the physically challenged is on the issue of how to help clients to understand the true nature and implication of his particular challenging situation. And then, to go ahead from there, to help him identify the known strategies for handling the disability. Information that is most relevant in this regard, is that concerned with the issue of where to obtain adequate diagnosis for his specific type of handicap, and then an assessment of the extent of his chances of gaining effective education in spite of all his conditions, and subsequently the opportunities he will have for entering into some gainful employment after receiving relevant training. 

To counsel them on how to obtain effective remediation for their peculiar handicap the counsellor needs to make adequate effort to acquaint himself with relevant information concerning the agencies and appropriate health organizations that are known to possess the 13 specialist personnel and resources for arresting further complication of the particular disabilities troubling his target client. The physically challenged client indeed can also be helped to be relevant of much of his anxieties if he is helped to identify and relate with all relevant philanthropic organizations both local and international, which can come to his aid, in his effort to negotiate effectively for assistances from such organizations. The Retirees The beginning of retirement marks a new phase in people lives. 

When one crosses the boundary between employment and retirement, questions of meaning will inevitably arise, if they have not been acknowledged. Even if there has been some thought about those questions, taking retirement provides an actual live experience rather anticipated experience. How do we find meaning in retirement? What will one do with the rest of his/her life? How can one build structure in his life to take the place of work? To be engaged in a worthy struggle might be essential to people’s survival. How can one make his/her life a worthwhile contribution to humanity? These are just some of the types of questions that are relevant to the retire (Tambawal 2008). These questions and similar ones make the retirees special population because they are saddled with the situation of disengaging from the bubbles of life, to retirement and its attendant problems. 

Tambawal (2008) asserted that professional literature have identified certain psycho social effects of retirement on retirees which calls for counselling such as disbelief or denial which according to Christy & Anyim (2005), is the situation in which one is in a fantasy. He is not sure whether he is dreaming or smoothing real is happening. Another problem as 14 identified by Akinade (2003) is anger where a retiree may be annoyed either with self, the employer; anyone in his family he suspects has contributed to his fate. Anxiety disorder, depression and substance abuse are also identified by Christy and Anyim (2005) as being part of the problems encountered by retirees. The identified problems call for a concerted effort from the counselling world to help retirees adjust to normal life. In counselling retiree therefore, Egong, Akepami and Usani (2005) suggested a normal programme for counselling, where they indicated that: to assist the retiree to adapt to another style of life on retirement, duration of which should be six months. 

The specific objectives of the training programme are as follows: (1) participate in pre-retirement orientation programme, (2) attend seminars and workshops on skills acquisition for alternative job, (3) learn how to make use of pension benefits, (4) Acquire interpersonal skills for new life. For counsellors to do this effectively Nwoye (1990), identified the following steps to be taken: (a) identification of the problem for which counselling remediation is sought; (b) Definition, in behavioural terms of the specific goal to be achieved in the face of the problem is in need of resolution. (c) Behavioural assessment and determination of the baseline data regarding the occurrence and intensity of the problem under attention; (d) Determination and selection of the treatment strategies to be applied for the achievement of the goal that has been specified.  (e) Evaluation of the counselling outcome vis-avis the goal but in advance of treatment strategies applied. 

Okpede (1998) identified the following as the counselling needs of retirees which should be the focus: (a) Vocational counselling (b) Readjustment counselling (c) Dietary counselling (d) Grooming counselling Retirement as a programme that inflicts psychological, social, economic and mental disadvantages on the victims can be seen to require specialized attention, and this is from no other source than counselling, a need to be properly groomed to welcome and cope successfully with it when it comes. 

RECOMMENDATION 

1. The counsellor based training curriculum in our Universities and Colleges of Education should be broadened and enlarged, so that trainees would come to terms with the specific needs of counseling clients with special problem during practical attachments. 2. Specialized training be given to individual counsellors instead of been generalist, the would be counsellor should trained in such a way he can conveniently and professionally handle issues relating to his specialization, like in medicine and law where people specialize in particular areas. 3. An increased public awareness on the role of counsellors in our midst should be undertaken by both print and electronic media. 4. The practicum for trainee counsellors should be conducted not only within the school setting but also within specialized areas and  population, so that trainees will come to face the life situations of clients. 5. A collaborative working relationship be formal between counsellors and others in the helping relationship, by sociologist, psychologist, psychiatrists, etc. so that ideas can be shared and meaningful assistance could be given to clients. 

Conclusion 

Counselling as a profession that is gaining acceptance in our school and non-school setting due to its approach in resolving human problems. Specific planning and approaches need to be in place for counselling special populations. Therefore, there is need for more expanded and specialized training of the would be counsellors and the Counselling Association of Nigeria (CASSON) needs to brace up to face the enormous challenges of counselling special populations. 

REFERENCES 

Abayemi, O.I. (1990). Drug Abuse and Discipline among School Going Youth. Book of Readings. Department of Education, Faculty of Education, Bayero University, Kano. In press 

Akinboye, J.O. (1982). Guidance and Counselling: Strategies and Youth Development. Ibadan: University Press. 

Akinade, E.A. (1993). Towards Satisfactory retirement a sociopsychological approach. Lagos: Kole Okanlawon services Ltd. 

Adegoke, A.A. (2003). Adolescents in Africa. Revealing the Problems of Teenagers in a contemporary African Society. Ibadan. Hadassah Publishing. 

Bulus, I. (1990) Guidance Practice in School, Jos: Ehindero Press. Bulus, I. (2009). Strategic Approaches for Planning and Organizing Functional Guidance Services in Target Population Segments. Readings on the key note address and lead papers presented at the 34th annual National Conference of the Counselling Association of Nigeria (CASSON), held at Bauchi/Abuja, Nigeria. (Yankari 2009). 

Deka Publications, jos Nigeria Carew, F.C. (2009). Counselling for Harmonious Restoration in Crisis Engulfed Targeted Groups of Clients. Readings on the key note address and lead papers presented at the 34th annual National Conference of the Counselling Association of Nigeria (CASSON). Held at Bauchi/Abuja. Nigeria (Yankari 2009). Deka Publications, Jos Nigeria 

Denga, D.I. (2009). Orientating Nigerians Towards Functional Societal Collaboration and partnerships for achieving the Goals of the Seven Point Agenda: The Guidance and Counselling Perspective. Maiden Distinguished annual lecture of CASSON. Peak Press Ltd. 

Christy, E & Tor Anyim S.A. (2005). Psycho-social effects of retirement on retirees: Implications for pre-retirement counselling in Nigeria. The Counsellor Volume 21. p-146-155 18 

Egong, A.I., Akpami, E.G., Usani (KSM), M.O. (2005) Counselling for retirement from service: Problems and Solutions. (CASSON) Conference Proceedings for 28th Annual Conference of the Counselling Association of Nigeria Maiduguri. Pg. 24-31 

Lar, C.T., Okpede, O.D; Bulus I. (1998) New Perspectives in Guidance and Counseling. Jos Feb Education Books. 

Mba, P.O. (1991) Elements of Special Education. Ibadan: Codat Publications. 

Mallum, M.P. (1983). Understanding Basic Principles to Guidance Services in Nigeria, Jos: University Press. 

Nwakaibie, K.B. (2006). “Minimizing the involvement of adolescents in corrupt practices through Counselling”. Conference Proceedings for the 30th Annual Conference of the Counselling Association of Nigeria, August. 

Nwoye, A. (1990). Counselling Psychology for Africa. Jos: Fab Anieh (Nig) Ltd. 

Nwoye, A. (1998). The Task and Demands of Counselling the Disabled Persons in Nigeria. Jos: Fab Anieh (Nigeria) Limited. 

Okon, S.E. (1983). Values in Counselling. in Uba A. (ed) Introduction to Counselling. Ife: Ife University Press. 

Okpede, E.O.D. (1998). Counselling in Government Setting, Jos: MONO Expressions Ltd. 

Tambawal, M.U. (2008). Counselling Nigerian Retirees for Political Participation. Sokoto Educational Review Vol. 10. No.(2). Pg. 78-86 

Yakubu, M.A. (2000). Guidance and Counselling of Special Populations. Jos: Deka Publications.

Tuesday, November 23, 2021

Language Development, Language and Cognition

Language Development

Defining Language

Language: a form of communication, whether spoken, written, or signed, that is based on a system of symbols

Language consists of the words used by a community and the rules for varying and combining them.

Infinite Generativity: ability to produce an endless number of meaningful sentences using a finite set of words and rules

Language’s Rule Systems 

Phonology: a language’s sound system provides basis for constructing large and expandable set of words out of 2 or 3 dozen phonemes

Morphology: units of meaning involved in word formation

Syntax: ways words are combined to form acceptable phrases and sentences

Semantics: meaning of words and sentences
Pragmatics: appropriate use of language in different contexts

How Language Develops:

Infancy

Whatever language they learn, infants all over the world follow a similar path in language development. 

Recognizing Language Sounds

Long before they begin to learn words, infants can make fine distinctions among the sounds of the language (Hollich & Houston, 2007). 

Kuhl’s (2007) research has demonstrated that from birth up to about 6 months of age, infants recognize when sounds change no matter from what language the syllables come.


Over about 6 months, infants get even better at perceiving the changes in sounds from their “own” language, the one their parents speak, and they gradually lose the ability to recognize differences that are not important in their own language.

Infants must fish out individual words from the nonstop stream of sound that makes up ordinary speech (Jusczyk, 2000). 
Babbling and Other Vocalizations

Long before infants speak recognizable words,   they produce a number of vocalizations                           (Jaswal & Fernald, 2007). 

The functions of these early vocalization are to practice making sounds, to communicate, and to attract attention (Lock, 2004). 


Babies' sounds go through this sequence during the first year:

crying

cooing

babbling

Gestures

Infants start using gestures, such as showing and pointing, at about 8-12 months of age.


Pointing- considered by language experts as important index of social aspects of language
follows this developmental sequence:

pointing without checking on adult gaze

pointing while looking back and forth between an object and the adult

Lack of pointing is a significant indicator of problems in the infant’s communication system.


First Words

Infants understand words before they can produce or speak them.

The infant’s first spoken word usually doesn’t occur until 10-15 months of age and at an average of about 13 months. 

The appearance of first words is a continuation of this communication process (Berko Gleason, 2005).

A child’s first words include those that name important people (dada), familiar animals (kitty),  vehicles (car), toys (ball), food (milk), body parts (eye), clothes (hat), household items (clock), and greeting terms (bye).

Above were the first words of babies 50 years ago. 

They are the 1st words of babies today. 

Children often express various intentions with their single words, so that “cookie” might mean, “That’s a cookie” or “I want a cookie.”

Infants understand about 50 words at about 13 months but they can’t say this many words until about 18 months (Menyuk, Liebergott, & Schultz, 1995). 

Infants’ receptive vocabulary (words the child understands) considerably exceeds spoken vocabulary (words the child uses).

average 18 month-old can speak about 50 words
average 2 year-old can speak about 200 words

rapid increase in vocabulary that begins at approximately 18 months is called the vocabulary spurt (Bloom, Lifter, & Broughton, 1985). 


Two-Word 

By the time children are 18-24 months of age, they usually utter two-word utterances.

To convey meaning with just two words, the child relies heavily on gesture, tone, and context. 

In every language, a child’s first combinations of words have an economical quality; they are telegraphic. 

Telegraphic speech: the use of short and precise words without grammatical markers such as articles, auxiliary verbs, and other connectives

Early Childhood
Between 2-3 years old, children quickly move into three-, four-, and five-word combinations, and transition from simple sentences/single ideas to complex sentences.

As children go through their early childhood years, their grasp of the rule systems that govern language increases.
Understanding Phonology and Morphology

During the preschool years, most children gradually become sensitive to the sounds of spoken words (National Research Council, 1999).

There is clear evidence that as they move beyond two-word utterances, children know morphological rules.

Children overgeneralize morphological rules, applying them to words that do not follow the rules.
Changes in Syntax and Semantics

Preschool children learn and apply rules of syntax (Marchman & Thal, 2005).          

They understand that to ask a question, they need to add a wh- word at the beginning of a sentence and invert the auxiliary verb.

Gains in semantics also characterize early childhood. 

As children move beyond the two-word stage, their knowledge of meanings also rapidly advances.
Between 18 months and 6 years of age, young children learn about one new word every waking hour (Carey, 1978; Gelman & Kalish, 2006)!

By the time children enter 1st grade, it is estimated they know about 14,000 words (Clark, 1993).

Children who enter elementary school with a small vocabulary are at risk for developing reading problems  (Berko Gleason, 2005; Berninger, 2006).


Why can children learn so many new words so quickly?

One possibility is fast mapping, which involves children’s ability to make an initial connection between a word and its referent after only limited exposure to the word (Woodward, Markman, & Fitzimmons, 1994).

Researchers have found that exposure to words on multiple occasions over several days results in more successful word learning than the same number of exposures in a single day (Childers & Tomasello, 2002).

Children benefit from hearing the words mature speakers use to test and revise their word-referent connections (Gershkoff-Stowe & Hahn, 2007). 

Advances in Pragmatics

As children get older, they become increasingly able to talk about things that are not here and not now.

At about 4 years of age, children develop a remarkable sensitivity to the needs of others in conversation and begin to use the article “the”; by 5 they sometimes use the article “a.”

Around age 4 or 5, they change their speech style to suit the situation.

Middle and Late Childhood

Children gain new skills as they enter school that make it possible to learn to read and write, or to advance the reading and writing skills they have developed in early childhood. 

These new skills include using language to talk about things that are not physically present, learning what a word is, and learning how to recognize and talk about sounds (Berko Gleason, 2005).

They have to learn the alphabetic principle:
letters of the alphabet represent sounds of the language.


Vocabulary , Grammar, and Metalinguistic Awareness

Changes occur in the way children’s mental vocabulary is organized.

Categorizing becomes easier as children increase their vocabulary.  

Vocabulary increases from an average of about 14,000 words at 6 years of age to an average of about 40,000 words by 11 years of age.

Children make similar advances in grammar.

Children's improvement in logical reasoning and analytical skills helps them understand such constructions as the appropriate use of comparatives (shorter, deeper) and subjectives (“If you were president . . .”). 

Advances in vocabulary and grammar during the elementary school years are accompanied by the development of metalinguistic awareness:

knowledge about language, such as knowing what a preposition is or the ability to discuss the sounds of a language


Reading

Vocabulary development plays an important role in reading comprehension (Berninger, 2006; Paris & Paris, 2006). 

Children who begin elementary school with a small vocabulary are at risk when it comes to learning to read (Berko Gleason, 2003).

Education and language experts continue to debate how children should be taught to read.

Debate focuses on the phonics approach versus the whole-language approach (Reutzel & Cooter, 2008).

The Phonics Approach

emphasizes that reading instruction should focus on phonics and basic rules for translating written symbols into sounds

Early reading instruction should involve simplified materials.

The Whole-language Approach

stresses that reading instruction should parallel children’s natural language learning

Reading materials should be whole and meaningful.

Children can benefit from both approaches, but direct instruction in phonics needs to be emphasized especially in kindergarten and 1st grade (Mayer, 2008; Mraz, Padak, & Rasinski, 2008).

Reading, like other important skills, takes time and effort (Pressley & others, 2007a).

Writing

Children’s writing emerges out of their early scribbles, which appear at around 2-3 years of age.

Most 4 year-olds can print their first name.

Most 5 year-olds can reproduce letters and copy several short words.

Becoming a good writer takes many years and much practice (Jalongo, 2007). 

A recent meta-analysis (use of statistical techniques to combine the results of studies) revealed that the following interventions were the most effective in improving 4th through 12th grade students’ writing quality: 
1) strategy instruction
2) summarization
3) peer assistance
4) setting goals (Graham & Perin, 2007).


Bilingualism and Second Language Learning

Learning a second language is more readily accomplished by children than adolescents or adults. 

Researchers have found that early exposure to a second language is optimal and ensures the least amount of damage to the home language and to the new language (Lessow-Hurley, 2005; Petitto, Kovelman, & Harasymowycz, 2003).

Some aspects of children’s ability to learn a second language are transferred more easily to the second language than others.


Bilingualism

The ability to speak two languages has a positive effect on children’s cognitive development (Gibbons & Ng, 2004).

Children who are fluent in two languages perform better than their single-language counterparts on tests of control of attention, concept formation, analytical reasoning, cognitive flexibility, and cognitive complexity (Bialystok, 2001).  In the United States, many immigrant children go from being monolingual in their home language   to bilingual in that language and in English, only to  end up monolingual speakers of English. 

This is called subtractive bilingualism and it can have negative effects on children, who often become ashamed of their home language.

What is the best way to teach children whose primary language is not English? 

for the last two decades, the preferred strategy has been bilingual education, which teaches academic subjects to immigrant children in their native language while slowly teaching English (Diaz-Rico & Weed, 2006; Ovando, Combs, & Collier, 2006) 

Advocates of bilingual education programs argue that if children who do not know English are taught only in English, they will fall behind in academic subjects.

Critics of bilingual programs argue that too often it is thought that immigrant children need only one year of bilingual education. 

Research supports bilingual education in that: 
Children have difficulty learning a subject when it is taught in a language they do not understand.

When both languages are integrated in the classroom, children learn the second language   more readily and participate more actively (Gonzales, Yawkey, & Minaya-Rowe, 2006; Hakuta, 2005).

Adolescence

Language development during adolescence includes   increased sophistication in the use of words.

Adolescents also develop more subtle abilities with words. 

Development of abstract thinking goes along with analyzing the function a word plays in a sentence.

Metaphor: implied comparison between unlike things
Satire: the use of irony, derision, or wit to expose folly or wickedness

Adolescents are better than children at:
organizing ideas
distinguishing between general and specific points
stringing together sentences that makes sense
organizing their writing

Young adolescents often speak a dialect of their own with their peers (a variety of language distinguished by its vocabulary, grammar, or pronunciation).

Biological Influences

Some language scholars view similarities in how children acquire language all over the world as strong evidence that language has a biological basis. 

Evolution and the Brain’s Role in Language
The nervous system and vocal apparatus of humanity’s predecessors changed over hundreds of thousands or millions of years (Fisher & Marcus, 2006). 

With advances in the nervous system and vocal structures, Homo sapiens went beyond the grunting and shrieking of other animals to develop speech.


Many experts believe that humans acquired language about 100,000 years ago.

Language gave humans an enormous edge over other animals and increased the chances of human survival (Lachlan & Feldman,  2003; Pinker, 1994).
There is evidence that particular regions of the brain are predisposed to be used for language (Imada & others, 2006).

Two regions involved in language were first discovered in studies of brain-damaged individuals: 

Broca’s area
- an area in the left frontal lobe of the brain involved in speech production and grammatical processing

Wernicke’s area:
a region of the brain’s left hemisphere involved in language comprehension 

Damage to either of these areas produces types of aphasia:

a loss or impairment of language processing

Individuals with damage to Broca's area have difficulty producing words correctly.

Individuals with damage to Wernicke’s area have poor comprehension    and often produce fluent but incomprehensible speech.

Chomsky’s Language Acquisition Device (LAD)

Linguist Noam Chomsky (1957) proposed that humans are biologically prewired to learn language at a certain time and in a certain way. 

Chomsky said that children are born into the world with a language acquisition device (LAD):
a biological endowment that enables the child to detect certain features and rules of language, including phonology, syntax, and semantics

LAD is a theoretical construct, not a physical part of the brain. 

Environmental Influences

Behaviorists opposed Chomsky's hypothesis and argued that language represents nothing more than chains of responses acquired through reinforcement (Skinner, 1957). 

According to behaviorists, language is a complex learned skill, much like playing the piano or dancing. 
The behavioral view of language learning has several problems:

It does not explain how people create novel sentences —sentences that people have never heard or spoken before. 

Children learn the syntax of their native language even if they are not reinforced for doing so.

The behavioral view is no longer considered a viable explanation  of how children acquire language. 

Many language experts argue that a child's experiences, the particular language to be learned, and the context in which learning takes place can strongly influence language acquisition (Snow & Yang, 2006; Tomasello, 2006). 

Child-directed speech:
language spoken in a higher pitch than normal with simple words and sentences (Zangl & Mills, 2007)

Adults often use strategies other than child-directed speech to enhance the child’s acquisition of language, including recasting, expanding, and labeling.

Recasting 
rephrasing something the child has said, perhaps turning it into a question or restating the child’s immature utterance in the form of a fully grammatical sentence
Expanding 
restating, in a linguistically sophisticated form, what a child has said
Labeling
identifying the names of objects
The encouragement of language development, not drill and practice, is the key. 
Language development is not a simple matter of imitation and reinforcement. 

Caring for Children

How Parents Can Facilitate Infants’ & Toddlers’ Language Development

Infants 
Be an active conversational partner.
Talk as if the infant understands what you are saying.
Use a language style with which you feel comfortable.

 How Parents Can Facilitate Infants’ & Toddlers’ 
     Language Development
Toddlers
 Continue to be an active conversational partner.
 Remember to listen. 
 Use a language style with which you are comfortable, but consider   
    ways of expanding your child’s language abilities and horizons.
 Adjust to your child’s idiosyncrasies instead of working against them.
 Avoid sexual stereotypes.
 Resist making normative comparisons.


An Interactionist View of Language

 emphasizes that both biology and experience contribute to 
   language development (Tomasello, 2006). 

 Jerome Bruner (1983, 1996) proposed that the sociocultural
   context is extremely important in understanding children’s
   language development.

 Bruner stresses the role of parents and teachers in constructing a
   language acquisition support system (LASS).

 Most language acquisition researchers believe that children from
   a wide variety of cultural contexts acquire their native language
   without explicit teaching. 


Language and Cognition
Williams Syndrome
 genetic birth disorder that includes:
 unique combination of expressive verbal skills and competent
interpersonal skills
 extremely low IQ 
 limited spatial and motor control

This raises 2 basic issues concerning the connection between language 
   and cognition:
 Is cognition necessary for language?
 Is language necessary for (or important to) cognition?

 Thought can influence language, and language can influence though, but rather than being part of a single automated cognitive system, each evolves as a separate, modular, biologically prepared component of the mind.





The Ecological View


The Ecological View
For the past several decades, much of the research on perceptual development In infancy has been guided by the ecological view of Eleanor and James J. Gibson (E. Gibson. 1969. 1989. 2001; J. Gibson. 1966. 1979). They argue that we do not have to lake bits and pieces of data from sensations and build up representations of the world in our minds. The environment itself is rich with information; our perceptual system selects from that rich output.
According to the Gibsons' ecological view, we directly perceive information that exists in the world around us. Perception brings us into contact with the environment in order to interact with and adapt to it. Perception Is designed for anion. Perception gives people such information as when to duck, when to turn their bodies through a narrow passages way, and when lo put their hands up to catch something.
In the Gibsons' view that the objects have affordances, which are opportunities for intcr.ini.in offered by objects that fit within our capabilities to perform activities. A pot may afford you something io cook with, and it may afford a toddler something to bang Adults immediately to know when a chair is appropriate for sitting, when a surface is safe for walking, or when an object is within reach. We directly and accurately perceive these affordances by sensing information from the environment—the light or sound reflecting from the surfaces of the world—and from our own bodies through muscle receptors, joint receptors, and skin receptors, for example.
Through perceptual development, children become more critical at discovering and using affordances. An important developmental question is. What affordances can infants or children detect and use? In one study, for example, when babies who could walk were faced with a squishy waterbed. they stopped and explored it, then chose to crawl rather than walk across it (Gibson & others. 1987). They combined perception and action lo adapt to the demands of the task.
Similarly, as we described earlier In the section on motor development, infants who were just learning to crawl or just learning to walk were less cautious when confronted with a steep slope than experienced crawlers or walkers were. The more experienced crawlers and walkers perceived that a slope affords the possibility not only for faster locomotion but also for falling. Again, infants coupled perception and action to make a decision about what to do in their environment.
Studying ihe infant's perception has not been an easy task. The Research In Life-Span Development interlude describes some of the ingenious ways researchers study the newborn's perception.

Gross Motor Skills

 Gross Motor Skills

Ask any parents about their baby, and sooner or later you are likely to hear about one or more motor milestone, such as "Cassandra just learned to crawl,' "Jesse is finally sitting alone." or "Angela look her first step last week." It is no wonder that parents proudly announce such milestones. They relied the transformation of babies from being unable to lift their heads to being able to grab things oil the grocery store shell. 10 chase a cat. and to participate actively in the family's social life. These milestones are examples of gross motor skills Gross motor skills involve large-muscle activities, such as moving one's arms and walking. Mow do gross motor skills develop through the life span?

The Development Of Posture Gross motor skills, as well as many other activities, require postural control (Thelen. 1995. 2000; Thelen & Smith. 2006). Infants need to control their heads to stabilize their gaze and to track moving objects. They also must have strength and balance in their legs to walk

Newborn infants cannot voluntarily control their posture. Within a few weeks though, they can hold their heads erect, and soon they can lift their heads while prone. By 2 months of age. babies can sit while supported on a lap or an infant seat, but silting independently is not accomplished until A or 7 months of age. Standing also develops gradually across the first year of life By about 8 months of age. Infants usually lean to pull themselves up and hold on to a chair and they often can stand alone by about 10 to 12 months of age.

In Thelen's (1995. 2000» view, posture is more than just holding still and straight though Posture, like other movements, is a dynamic process that is linked with several sensory modalities; proprioception from the skin, joints, and muscles; vestibular organs in the inner ear that regulate balance and equilibrium; and cue from vision and hearing.

Locomotion and postural control are closely linked especially in walking upright. Walking upright requires being able both to balance on one leg as the other is swung forward shift the weight from one leg to the other.

Although infants usually team to walk about their first birthday, the neural pathways that control the leg alternation component of walking are in place from i very early age, possibly even in birth or before Infants engage in frequent alternating kicking movements throughout the first six months of like when they are lying on their backs. Also when 1- to 2-momh-olds are given support with their feet in contact with a minimized treadmill, they show well-coordinated, alternating steps.

If infants can produce forward stepping movements so early, why does il lake them so long to learnt to walk? The key skills in learning to walk appear to be stabilizing balance on one leg long enough to swing the other forward and shifting the weight without falling. This is a difficult biomechanical problem to solve, and it takes infants about a year to do It.



REFLEXES

 REFLEXES

The newborn is not completely helpless. Among other things, it has some basic reflexes. For example, the newborn automatically holds its breath and contracts its throat to keep water out. Reflexes are built-in reactions to stimuli; they govern the newborn’s movements, which are automatic and beyond the newborn’s control. Reflexes are genetically carried survival mechanisms. They allow infants to respond adaptively to their environment before they have had an opportunity to learn.  

The rooting and sucking reflexes are important examples. Both have survival value for newborn mammals, who must find a mother’s breast to obtain nourishment.

The rooting reflex occurs when the infant’s cheek is stroked or the side of the mouth is touched. In response, the infant turns its head toward the side that was touched in an apparent effort to find something to suck. The sucking reflex occurs when newborns automatically suck an object placed in their mouth. This reflex enables newborns to get nourishment before they have associated a nipple with food; sucking also serves as a self-soothing or self-regulating mechanism.

Another example is the Moro reflex , which occurs in response to a sudden, intense noise or movement. When startled, the newborn arches its back, throws back its head, and flings out its arms and legs. Then the newborn rapidly closes its arms and legs. The Moro reflex is believed to be a way of grabbing for support while falling; it would have had survival value for our primate ancestors.

Some reflexes—coughing, sneezing, blinking, shivering, and yawning, for example—persist throughout life. They are as important for the adult as they are for the infant. Other reflexes, though, disappear several months following birth, as the infant’s brain matures, and voluntary control over many behaviors develops. The rooting and Moro reflexes, for example, tend to disappear when the infant is 3 to 4 months old.

The movements of some reflexes eventually become incorporated into more complex, voluntary actions. One important example is the grasping reflex , which occurs when something touches the infant’s palms. The infant responds by grasping tightly.  By the end of the third month, the grasping reflex diminishes, and the infant shows a more voluntary grasp. As its motor development becomes smoother, the infant will grasp objects, carefully manipulate them, and explore their qualities. An overview of the reflexes we have discussed, along with others, is given in Figure 5.1.  Although reflexes are automatic and inborn, differences in reflexive behavior are soon apparent. For example, the sucking capabilities of newborns vary considerably. Some newborns are efficient at forcefully sucking and obtaining milk; others are not as adept and get tired before they are full. Most infants take several weeks to establish a sucking style that is coordinated with the way the mother is holding the infant, the way milk is coming out of the bottle or breast, and the infant’s temperament.

reflexes Built-in reactions to stimuli.

rooting reflex A newborn’s built-in reaction that occurs when the infant’s cheek is stroked or the side of the mouth is touched. In response, the infant turns its head toward the side that was touched, in an apparent effort to find something to suck.

sucking reflex A newborn’s built-in reaction of automatically sucking an object placed in its mouth. The sucking reflex enables the infant to get nourishment before it has associated a nipple with food.

Moro reflex A neonatal startle response that occurs in reaction to a sudden, intense noise or movement. When startled, the newborn arches its back, throws its head back, and flings out its arms and legs. Then the newborn rapidly closes its arms and legs to the center of the body.

grasping reflex A neonatal reflex that occurs when something touches the infant’s palms. The infant responds by grasping tightly.

gross motor skills Motor skills that involve large muscle activities, such as moving one’s arms and walking.

THE DYNAMIC SYSTEMS VIEW

 THE DYNAMIC SYSTEMS VIEW

Arnold Gesell (1934) had discovered that infants and children develop rolling, sitting, standing, and other motor skills in a fixed order and within specific time frames. These observations showed that motor development comes about through the unfolding of a genetic plan, or maturation.

Later studies demonstrated that the sequence of developmental milestones is not as fixed as Gesell indicated and not due as much to heredity as Gesell argued. In the last two decades, the study of motor development experienced a renaissance as psychologists developed new insights about how motor skills develop. One increasingly influential theory is dynamic systems theory, proposed by Esther Thelen.

According to dynamic systems theory, infants assemble motor skills for perceiving and acting. Notice that perception and action are coupled, according to this theory. To develop motor skills, infants must perceive something in the environment that motivates them to act and then use their perceptions to fine-tune their movements. Motor skills represent solutions to the infant’s goals.

How is a motor skill developed, according to this theory? When infants are motivated to do something, they might create a new motor behavior. The new behavior is the result of many converging factors: the development of the nervous system, the body’s physical properties and its possibilities for movement, the goal the child is motivated to reach, and the environmental support for the skill. For example, babies learn to walk only when maturation of the nervous system allows them to control certain leg muscles, when their legs have grown enough to support their weight, and when they want to move.

Mastering a motor skill requires the infant’s active efforts to coordinate several components of the skill. Infants explore and select possible solutions to the demands of a new task; they assemble adaptive patterns by modifying their current movement patterns. The first step occurs when the infant is motivated by a new challenge—such as the desire to cross a room—and gets into the “ballpark” of the task demands by taking a couple of stumbling steps. Then, the infant “tunes” these movements to make them smoother and more effective. The tuning is achieved through repeated cycles of action and perception of the consequences of that action. According to the dynamic systems view, even universal milestones, such as crawling, reaching, and walking, are learned through this process of adaptation: infants modulate their movement patterns to fit a new task by exploring and selecting possible configurations.

Thus, according to dynamic systems theory, motor development is not a passive process in which genes dictate the unfolding of a sequence of skills over time. Rather, the infant actively puts together a skill to achieve a goal within the constraints set by the infant’s body and environment. Nature and nurture, the infant and the environment, are all working together as part of an ever-changing system.

The Brain

 The Brain

Brain physiology

The brain includes a number of major structures. The key components are neurons and the nerve cells that handle information processing.
Structure and function
Forebrain (top portion)
Cerebral cortex (outer layer - cap) has four lobes
Frontal, occipital, temporal, parietal lobes
Deeper in brain:
Hypothalamus, pituitary gland, amygdala,  hippocampus

The brain has two halves, or hemispheres. The top portion of the brain, farthest from the spinal cord, is known as the forebrain. Its outer layer of cells, the cerebral cortex, covers it like a cap. The cerebral cortex is responsible for about 80 percent of the brain’s volume and is critical in perception, thinking, language, and other important functions. 
 Each hemisphere of the cortex has four major areas, called lobes. Although the lobes usually work together, each has a somewhat different primary function.

Deeper in the brain, beneath the cortex, lie other key structures. These include the hypothalamus and the pituitary gland as well as the amygdala, which plays an important role in emotions, and the hippocampus, which is especially active in memory and emotion.

Functions of Lobes of the Cortex

Frontal         Involved in voluntary movement, thinking,  personality, and intentionality or purpose
Occipital Function in vision
Parietal         Active role in hearing, language  processing, and memory
Temporal Roles in registering spatial location,  attention, and motor control

Neurons — nerve cells handling information  processing at the cellular level
Axon, dendrites, synapses
Neurotransmitters: dopamine
Myelin sheath and myelination
Neural circuits
Lateralization — specialization of functions in one  hemisphere of cerebral cortex

Basically, an axon sends electrical signals away from the central part of the neuron. At the end of the axon are terminal buttons, which release chemicals called neurotransmitters into synapses, which are tiny gaps between neurons’ fibers. Chemical interactions in synapses connect axons and dendrites, allowing information to pass from neuron to neuron. Similarly, a message in the brain is sends across the synapse by a neurotransmitter.  
Most axons are covered by a myelin sheath, which is a layer of fat cells. The sheath helps impulses travel faster along the axon, increasing the speed with which information travels from neuron to neuron. The myelin sheath developed as the brain evolved. As brain size increased, it became necessary for information to travel faster over longer distances 
in the nervous system.  
Clusters of neurons known as neural circuits work together to handle particular types of information. The brain is organized in many neural circuits. This neural circuit uses the neurotransmitter dopamine and lies in the prefrontal cortex area of the frontal lobes. 
 To some extent, the type of information handled by neurons depends on whether they are in the left or right hemisphere of the cortex.
This specialization of function in one hemisphere of the cerebral cortex or the other is called 
lateralization. However, most neuroscientists agree that complex functions such as reading or performing music involve both hemispheres. Complex thinking in normal people is the outcome of communication between both hemispheres of the brain.

Infancy
Shaken Baby Syndrome
Born with about 100 billion neurons
Brain flexibility and resilience demonstrated in  deprived environments
Dramatic increases of neural connections
Brain areas do not mature uniformly; skills affected  by myelination and interconnections

Brain is developing so rapidly in infancy, the infant’s head should be protected from falls or other injuries and the baby should never be shaken. 

Shaken baby syndrome, which includes brain swelling and hemorrhaging. A recent analysis found that fathers were the most frequent perpetrators of shaken baby syndrome, followed by child care providers and by a boyfriend of the victim’s mother.

Studying the brain’s development in infancy is through Positron-emission tomography (PET) scans, magnetic resonance imaging (MRI), and electroencephalogram (EEG).
Among the researchers who studied the brain development was Charles Nelson and his colleagues found that  newborns 
produce distinctive brain waves that reveal they can distinguish their mother’s voice while they are asleep.
As an infant walks, talks, runs, shakes a rattle, smiles, and frowns, changes in its brain are occurring.

infant’s brain is waiting for experiences to determine how connections are made. Before birth, it appears that genes mainly direct basic wiring patterns. Neurons grow and travel to distant places awaiting further instructions. After birth, the inflowing stream of sights, sounds, smells, touches, language, and eye contact help shape the brain’s neural connections.

 Changing Neurons Newborn’s brain is about 25 percent of its adult weight. By the second birthday, the brain is about 75 percent of its adult weight. Two key developments during these first two years involve the myelin sheath (the layer of fat cells that speeds up the electrical impulse along the axon) and connections between dendrites. Myelination, the process of encasing axons with a myelin sheath, begins prenatally and continues after birth (see Figure 4.11). Myelination for visual pathways occurs rapidly after birth, being completed in the first six months. Auditory myelination is not completed until 4 or 5 years of age. Some aspects of myelination continue even into adolescence.

Infancy
Myelination; visual and auditory
Rapid growth of myelin sheath, dendrite and  synapse connections
Blooming and pruning of connections in brain
At birth, greater activity in left hemisphere
Motor control begins about 2 months
Vision occurs about the fourth postnatal month
Brain involved in hearing and language.
Prefrontal cortex (higher-level thinking and self-regulation occur), after 3 years of age. 
Both heredity and environment are influence synaptic overproduction and subsequent pruning.


Changing Structures
At birth, the hemispheres already have started to specialize: 
Newborns show greater electrical activity in the left hemisphere than in the right hemisphere when they are making or listening to speech sounds.
►Primary motor and sensory areas develops.
►The frontal lobes are immature in the newborn. However, myelinated and interconnected.
►develop an ability to regulate their physiological states, such as sleep, and gain more control over their reflexes. 
►Cognitive skills (deliberate thinking) do not emerge until later in the first year.



Childhood
The brain and head grow more rapidly than any  other part of the body — growth curves
Some brain size increase due myelination and  number and size of dendrites
Greatest anatomical brain increases from ages 3  to 15 years; distinct bursts of growth
Ages 3 to 6; most rapid growth in frontal lobe
Age 6 to puberty; most dramatic growth in  temporal and parietal lobes
Promotes spatial relations and language
Brain pathways and circuitry promote cognitive  control (attention, thoughts, actions, choices)


Adolescence
Using fMRI brain scans, scientists have recently discovered that adolescents’ brains undergo significant structural changes.
Brain continues growth
Corpus callosum – connect the brain’s left and right hemispheres, axon fibers thicken & ability to process information.
Prefrontal cortex – increased reasoning, decision  making, self-control.
Amygdala – seat of emotions, matures earlier
– Positive link between volume and duration of  aggressive behavior toward parents


Developmental social neuroscience, which involves connections between development, the brain, and socioemotional processes.

Research on brain development and changes
Thicker prefrontal cortex, more brain connections linked  to peer pressure resistance
Early ‘turbo charged’ emotions – more risky behaviors,  drug use, legal system involvement?
Brain change – result of biology, experiences

Adulthood and aging
Brain loss: 5-10% of weight in ages 20 to 90
Dendrites decrease; myelin sheath damage
Shrinkage is not uniform; most in prefrontal cortex
General slowing of brain and spinal cord function
Begins in middle age, accelerates with age
Reductions in neurotransmitters

The adapting brain
Exercise and activities influence development
Remarkable repair capability
Neurogenesis – new cells generated
Dendrite growth; “rewiring” to compensate loss
Less lateralization with age, more adaptation








Sexual Maturation, Physical changes in females

 Sexual Maturation

Researchers have found that male pubertal characteristics develop in this order:

increase in penis and testicle size, minor voice 

change, first ejaculation (masturbation or a wet dream), appearance of pubic hair, onset of maximum body growth, growth of hair in armpits, more detectable voice changes, and growth of facial hair. 

Three noticeable areas of sexual maturation in boys are penis elongation, testes development, and growth of facial hair.


Physical changes in females?

First, the breasts enlarge and then pubic hair appears (armpits).

Height ↑, and hips become wider than her shoulders. 

First menstruation (menarche) occurs; it is considered normal if it occurs between the ages of 9 and 15. Initially, menstrual cycles may be highly irregular. 

For the first several years, might not ovulate during every menstrual cycle. 

Some girls do not become fertile until two years after their periods begin. 

Pubertal females do not experience voice changes comparable to those in pubertal males. By the end of puberty, the female’s breasts have become more fully rounded.


Body Image
Psychological aspect of physical change in puberty:
Preoccupation with body image and develop images of what their bodies are like is strong throughout adolescence, but it is especially acute during early adolescence, a time when adolescents are more dissatisfied with their bodies.
Girls are less happy with their bodies and have more negative body images than boys.
Girls fat increases (-'ve) &  Boys muscle mass increases (+'ve).

 Early and Late Maturation
Did you enter puberty early, late, or on time?
Adolescents often perceive themselves differently and their maturational timing is linked to their socioemotional development and whether they develop problems.
In the Berkeley Longitudinal Study, early-maturing boys perceived themselves more positively and had more successful peer relations than did late maturing boys. Girls were similar but not as strong as for boys. 
Late-maturing boys were in their thirties had developed a more positive identity than the early maturing boys had. 
They had more time to explore life’s options, or perhaps the early-maturing boys continued to focus on their physical status instead of paying attention to career development and achievement.

Early-maturing girls are more likely to smoke, drink, be depressed, have an eating disorder, struggle for earlier independence from their parents, and have older friends; 
and their bodies are likely to elicit responses from males that lead to earlier dating and earlier sexual experiences.

And early-maturing girls are less likely to graduate from high school and tend to cohabit and marry earlier.

Apparently as a result of their social and cognitive immaturity, combined with early physical development, early-maturing girls are easily lured into problem behaviors.

Growth spurt

 Growth spurt

As indicated in Figure 4.3, the growth spurt associated with puberty occurs approximately two years 

earlier for girls than for boys. 

 x̄  of USA - 9 yrs for girls and 11 yrs for boys. 

Pubertal change peaks at an avg. of 11.5 years for girls and 13.5 years for boys. 

Girls ↑ height 3.5 inches /year, boys about 4 inches. 

 Boys and girls who are shorter or taller than their peers before adolescence.  

At the beginning of adolescence, girls taller than boys but by the end of the middle school years most boys have caught up, or, even surpassed girls in height.





Body Growth and Change, Hormonal changes

Body Growth and Change

Puberty

Hormonal changes
Powerful chemicals from endocrine glands
Hypothalamus – eating and sexual behavior
Pituitary gland – controls growth, regulates glands
Gonads – male testes, female ovaries
Gonadotropins – stimulate testes, ovaries

The hypothalamus is a structure in the brain best known for monitoring eating, drinking, and sex. 

The pituitary gland is an important endocrine gland that controls growth and regulates other glands. 

The gonads are the sex glands—the testes in males, the ovaries in females. 

The key hormonal changes involve two classes of hormones that have significantly different concentrations in males and females. 
Androgens are the main class of male sex hormones .  
Estrogens are the main class of female hormones. 

Testosterone is an androgen that is a key hormone in the development of 
puberty in boys. As the testosterone level rises during puberty, external genitals 
enlarge, height increases, and the voice changes. 

Estradiol is an estrogen that plays an important role in female pubertal development. As the estradiol level rises, breast development, uterine development, and skeletal changes occur.

Hormones increase dramatically in adolescence
Testosterone – voice change, genital growth
Dominates male changes
Estradiol – estrogen for breast growth
Dominates female changes
Onset affects social competence
Behaviors and moods can affect hormones


Links between hormones and adolescent behavior?
Findings are inconsistent.
Hormonal factors alone are not responsible.
Social factors  in young adolescent girls’ depression and anger.
Hormones do not act independently; 
Hormonal activity is influenced by many environmental factors, including parent adolescent relationships. 
Stress, eating patterns, sexual activity, and depression can also activate or suppress various aspects of the hormone system.