Defining adolescence
13 until the person legally becomes an adult
“A period of life that begins with puberty and extends for 8 – 10 years or longer until the person is physically and psychologically mature, and ready to assume adult responsibilities”.
Puberty
Puberty Onset
Puberty Characteristics at different ages
Females: -Height spurt 8-17 yrs -Menarche 10 – 16 -Breast Dev 8 – 18 -Pubic & Underarm Hair 11 – 14
Males:
Height Spurt 10 – 20 yrs
Penile Dev 10 – 16
Testicular Dev 9 – 17
Pubic, Facial, Underarm
And Chest Hair 12 – 16Menarche
-In every decade from 1840 to 1950 there was a drop of four months in the average age of menarche (use to be at 17)
-The average age in North America 11.75 years.
-A viable ovum is often not produced during the first 12-24 months following menarche.
-About 80% of cycles in postmenarchial girls are anovulatory (they don’t involve release of an oocyte [egg]). Even in the 3rd year, about 50% are anovulatory.
-onset of puberty may be associated with the percentage of body fat. a level of at least 17% body fat is critical to menarche
>low BMI bad because it means insuffient estrogen production which protects against osteoporosis
Hypothalamus
A portion of the brain that carries out a number of functions: regulates body temperature; regulates body fluid balance; influences sleep and wakefulness; influences reactions to pain and pleasure.
**It also regulates the release of certain Pituitary gland hormones that have a direct influence on the development of primary and secondary sex characteristics and reproductive capabilities.
Primary/Secondary sex characteristics
Primary sex characteristics are the sex organs that are involved with reproduction.
Secondary sex characteristics are any of the external physical characteristics of sexual maturity secondary to hormonal stimulation that develop in the maturing individual. Secondary sex characteristics do not play a direct role in reproduction but contribute to differentiating the sexes. Examples are facial hair in males and breast development in females.
Pituitary Gland
Define:
Gonadotropins
Follicle Stimulating Hormone (FSH)
Leutinizing Hormone (LH)
ICSH
Gonadotropins (hormones that stimulate the gonads to produce specific substances)
Follicle Stimulating Hormone (FSH): Influences the production of estrogen in females and the formation of sperm in males.
Leutinizing Hormone (LH): Along with FSH, acts to influence the production of progesterone in females. Influences testes in males to produce testosterone [called ICSH in males]
The gonads are: testes in males and ovaries in females.
ICSH stands for: Interstitial Cell Stimulating Hormone
Feedback loop that regulates hormone release
When hormonal activity is called for, the hypothalamus stimulates the pituitary gland with GnRH (gonadotropin releasing hormone)
When sufficient hormones exist, the hypothalamus releases gonadotropin inhibiting hormones to signal the pituitary gland to stop releasing its gonadotropins .
5 Biological Stages of Puberty Female
Stage 1 –> 8-11:
there are no outside signs of development, but ovaries are enlarging and hormone production is beginning.
Stage 2 –> 11-12:
The first sign is typically the beginning of breast growth, including “breast buds.” A female may also grow considerable height and weight. The first signs of pubic hair start out fine and straight, rather than curly
Stage 3 –> 12-13:
Breast growth continues, and pubic hair coarsens and becomes darker, but there still isn’t a lot of it. The body is still growing, and vagina is enlarging and may begin to produce a clear or whitish discharge, which is a normal self-cleansing process. Some get their first menstrual periods late in this stage.
Stage 4 –> 13-14:
Pubic hair growth takes on the triangular shape of adulthood, but doesn’t quite cover the entire area. Underarm hair is likely to appear in this stage, as is menarche. Ovulation begins in some, but typically not in a regular monthly routine until Stage 5.
Stage 5 –> 15:
This is the final stage of development, when a girl is physically an adult. Breast and pubic hair growth are complete, and full height is usually attained by this point. Menstrual periods are well established, and ovulation occurs.
5 Biological Stages of Puberty Male
Stage 1 –> 10:
Male hormones are becoming active, but there are hardly, if any, outside signs of development. Testicles are maturing, and some boys start a period of rapid growth late in this stage.
Stage 2 –> 12-13:
Testicles and scrotum begin to enlarge, but penis size doesn’t increase much. Very little, if any, pubic hair at the base of the penis. Increase in height and change in body shape.
Stage 3 –> 13-14:
Penis starts to grow in length, but not much in width. Testicles and scrotum still growing. Pubic hair starts to get darker and coarser and is spreading towards the legs. Height growth continues and body/face shape look more adult. Voice begins to deepen (and crack). Some hair around the anus grows.
Stage 4 –> 14-15:
Penis width increases, as well as length. Testicles and scrotum still growing. Pubic hair begins to take adult texture, although covers a smaller area. Most have first ejaculations. Underarm hair develops. Facial hair increases on chin and upper lip. Voice gets deeper and skin gets more oily.
Stage 5 –> 16:
Nearing full adult height and physique. Pubic hair and genitals have adult appearance. Facial hair grows more completely and shaving may begin now or soon.
adolescent growth spurt
Effects of early and late onset puberty
Early Onset
-have a better self-image, & in general, are comparatively more popular
-males are more likely to engage in delinquent & antisocial behaviour, and are more likely to use drugs/alcohol and take part in precocious sexual activity.
-females, in general, are comparatively more popular
-females experience:
>Less positive self-image
>Higher rates of depression, anxiety and disordered eating
>Greater likelihood of alcohol/drug use & early sexual intercourse
Late Onset
Early Adolescence Stages
Middle Adolescence Stages
-Peer group allegiance is generally at its peak
-Peer relationships provide a sense of belonging and help adolescent elaborate on his or her identity
-Having a supportive peer group has been linked with positive personal development, including positive self-concept, and achievement.
-Positive peer relationships enable adolescents to explore problems and issues together, without feeling threatened, as is often the case in “unequal” relationships with adults
-is also the time when individuals are more susceptible to expectations for peer group conformity.
-Individuals who are most susceptible to conformity demands are:
>Those who are self-conscious, insecure & don’t want to stand out as “different”
>Those who perceive themselves as less competent in relation to seemingly more competent peers
>Those who are perceived to be middle status adolescents
Late Adolescence Stages
Adolescence and Mental Health
-The prevalence of 3 problems increases significantly during adolescence
Depression
Alcohol & drug dependency
Eating disorders
Sex Education
-An important issue is in the pressure that is felt to have sexual intercourse as a function of sexual capacity
-Some are not prepared because of
>Absence of information about contraception
>Not wanting to appear prepared because doesn’t conform to self-image
>Un-comfortability in discussing intimacy & own unpreparedness; not wanting to displease partner
>Macho male image
-How much sex education to provide youth, as well as how young to start, is a contentious social and political issue.
-The more education youth have the more safer sex they have and more likely to have a positive relationship with their sexuality
Young Adulthood
-18-25 & ending at 45 years
Legal description
-In Manitoba, 18 year olds are considered to be fully capable and competent for their decisions. They may consume controlled substances, participate in legal processes as well as political processes (voting). They are fully legally accountable for their actions
Cultural and historical contexts
Psychological and social contexts
-Person’s view of self, how others view person, and how that person behaves may be factors.
Physical Development
Cognitive Development
Changes in the way young adults thinking differs from adolescents:
• Dualistic Thinking is used to describe an adolescent’s view of the world. Everything is seen in polar terms or opposites: good or bad, right or wrong.
• As youth mature, dualistic thinking is replaced by Multiple Thinking.
• They gradually become aware of the diversity of opinion in other people
• Young adults may come to understand that truth is relative, and knowledge is often constructed, contextual and not absolute.
Emotional Development
• Increased clarity & consistency of personality
• Stabilization of self & identity
• Increased coping skills
• Decrease in youthful illusion, fantasy
• Expanded personal resources for development & maintenance of happiness, and…………….
•As a general rule, at the end of adolescence & during the young adult years, the body is at its peak……….
• If that’s the case, what accounts for this:
-Alcoholism & drug addiction are at their peaks between 18 & 40.
-Studies across countries show that the risk of emotional disturbance of almost any kind is highest between the ages of 25 & 44.
–>As people enter into an independent life, a lot more pressure start to pile up in life and this can be a lot, especially in a culture that stigmatizes asking for help
Psychosocial Developmental Tasks