PSY210: 6. Physical and Cognitive Development in Adolescence Flashcards
Adolescence
period extending from onset of puberty to early adulthood betw 12 + 20
Puberty: reproductive system matures
roughly begins around puberty, not dependent on puberty
cultural construct - fuzzy boundaries
Adolescence: A Brief History in Ancient Times
Plato - infancy, 0-6/7, childhood 6/7-12, 3rd stage in life
Serious education can begin
learn sports, instruments
when children are capable of learning
Adolescence: A Brief History
Aristotle - children are driven by impulses
Only by the end of adolescence does reason establish a firm control
as teens we learn how to be rational
high school - structured differently, in depth material, abstract
elementary - diff topics + activities to get general idea
Adolescence: A Brief History - from early christian times through the middle ages
Saint Augustine - lived an impulsive, excessive lifestyle until his conversion to Christianity
Argued Christian morality provides means by which reason can rule over passion
time to curtail impulse + immorality
Adolescence: A Brief History - from early christian times through the middle ages
Children’s Crusades - evidence that adolescence was viewed as a period of innocence
children to holy land in hopes that child’s innocence will convince them to share Jerusalem - didn’t work - they were teens
we see them as still innocent
Adolescence: A Brief History - from 1500 to 1890
Life-cycle service - period in late teens + 20s young people engage in domestic service, farm service/apprenticeships in various trades and crafts
18th -19th centuries: young people seen as social problem
In response - social institutions were created, time to acquire a skill, trades they were working in ceased to exist
would leave homes, couldn’t find jobs
YMCA: proliferation of adolescents, need something for them to do
The Age of Adolescence 1890 to 1920
Enactment of laws restricting child labor - ready source of labour: cheap, easily heal, lots of them
adolescents formerly employed are now unemployed
The Age of Adolescence 1890 to 1920
New requirements for children to attend secondary school - laws came at various times
Development of the field of adolescence as an area of scholarly study - G. Stanley Hall coined term
G. Stanley Hall: Theory of Recapitulation
time of “storm and stress”
In contrast, most adolescents experience healthy social + emotional development
based off of Darwin - reenactment of human evolution
tumultuous time, moodiness, upheaval - wars, times of upheaval
abandoned theory
seen as a relatively calm time in development
Physical Development
Early: 11–12 to 14 years - Rapid pubertal change, moving ever younger, going through puberty
younger + younger due to nutrition, better fed + reliable than in the past
Physical Development
Middle: 14 to 16 years - Puberty nearly complete
Late: 16 to 18 years - Full adult appearance, Anticipation of adult roles, ready to work, take on adult activities
Physical Development in Adolescence
Puberty - reproductive systems mature
Endocrine system - glands that release hormones into blood stream, which affect development
Path of puberty: Hypothalamus > Pituitary Gland and Gonadotropin > Gonads and Sex Hormones
Physical Development in Adolescence
release 2 years before signs of puberty seen
pituitary release Gonadotropin - sex hormones
body has met threshold of body fat - has sufficient + reliable nutrition to start
increase in child obesity - early onset puberty more common
children need baby fat to grow
Hormonal Changes in Puberty
Growth hormone + thyroxine increase age 8–9
Estrogens: more in girls, adrenal estrogens
Androgens: more in boys. testosterone
both released in development of boys + girls, only difference is proportions
Physical Growth
result of increased levels of sex hormones, there is drastic change in rate of physical growth
Adolescent growth spurt: Peak height velocity - fastest growth - cm/year
Asynchronicity: gr. 5-7: girls start growing taller than boys
boys start catching up + surpassing
Sex Differences in Body Growth in Adolescence
Boys Girls
Growth spurt starts age 121⁄2 starts age 10
Proportions shoulders broaden hips broaden
longer legs
Muscle–fat gain more muscle, gain more fat
makeup aerobic efficiency
testosterone causes development of lungs
girls need fat for growth
Adolescent Brain Development
Pruning continues: in PFC (efficient network), quick access
Growth and myelination speed up: frontal lobes + cerebellum - increase speed
Neurotransmitter response changes
Frontal lobes: Strengthen connections among regions
Adolescent Brain Development
More sensitive to excitatory messages: brain more responsive to neurotransmitter - more sensitive to excitatory signals
Cognitive advances: attention, planning integrating, information, self-regulation
Adolescent Brain Development
Intensifies reactions to stress: pleasure, novelty
responsiveness of neurotransmitters
able to make sense of small amount of info
responds more strongly to dopamine - why they seek pleasure + feel more stressed
Reactions to Puberty: Early and late maturing girls
Early - more negative effects due to cultural views about appearance + changing peer groups
starts interacting with her as an adult - thinking that they are more culturally or cognitively
interacting with older peers - start drinking, having sex
earlier you hit it, the shorter their peak is
harder to be thin for short ppl, valued early on + discarded after
Reactions to Puberty: Early and late maturing girls
Late - more teasing from peers for a period of time
Most negative effects dissipate by adulthood
not overwhelming teasing, but end up conforming on
Reactions to Puberty: Early and late maturing boys
Early - both positive and negative effects
positive - more muscle mass, conforming to society ideals
better at sports, but start hanging out with older ppl - early sexual activity, substance abuse
Late - only negative effects
not as good as sports, want to be mature so they act older - substance abuse
Reactions to Puberty: Girls
Surprised about how early it happens, More positive than in past - more common that they are informed
Preparation, information help
Father’s involvement helps
Ethnic variations
Reactions to Puberty: Boys
Mixed reactions, Sooner than expected
Preparation helps
Could benefit from telling people
most boys have no idea what’s going on
Sleep Habits in Adolescence
Still need almost as much sleep, but go to bed later
biological “phase delay” - circadian rhythm - more alert later in the evening
social habits
sleeping far less than they need to
Lack of sleep impairs regulation of attention,
emotion
lower achievement: linked to poor performance, frontal lobe doesn’t have as much nutrients
mood problems: more cranky
high-risk behaviours
missing about 3-4 hours from recommended alottment of sleep
schools in europe should start later
Adolescent Moodiness
More negative life events - responsibilities, pressure
not actually moodier, just appropriately responding to a somewhat difficult time of development
get into university, form friendships, romantic relationship, get a job
reacting appropriately to new experiences
Adolescent Moodiness
Stronger responses: more excitatory - stronger positive/negative emotion, greater anxiety
Mood swings
related to daily events
cultural scripts
Adolescent Emotions Across the Week
if truly moody, we wouldn’t see a pattern
respond more strongly, but not that they’re moody
Eating Disorders
Severe dieting strong indicator, fixation on weight
Family relationships
Cultural pressure
anorexia nervosa
starve out of fear of getting fat, difficult to treat, causes anxiety
Eating Disorders
bulimia nervosa: strict diet and exercise, then binge
+ purge - vomitting causes deterioration of teeth, esophagus, heartburn, can’t control vomitting, more common, easier to treat
Compulsive Exercise: Drive for thinness, perfectionism - more common in men
1/10 for anorexia/bulimia, compulsive exercise increase due to changing ideal body types in society
Adolescent Sexuality
North American attitudes restrictive: media contradicts family messages - everybody is having it + it is awesome
family messages are the opposite - lack of discussion + rejection of sexuality
find it awkward to talk to them especially if they want specifics
Adolescent Sexuality
conservative when interacting with adolescents
abstinence programs
more liberal over past 40 years
most say premarital sex OK for committed partners
Adolescent Sexuality
Activity matches attitudes: rates declining since 1990s, few partners
decline for youngest age group, in line with current attitudes
more accepting, only when you’re ready
very few have multiple sexual partners
Sexually Active Adolescents
individuals in late is more acceptable
girls tend to prefer older men, girls are ready at an earlier age for sex
Sex Differences in Body Growth in Adolescence
Boys Girls Growth spurt starts age 121⁄2 starts age 10 Proportions shoulders broaden, longer legs hips broaden Muscle–fat makeup gain more muscle, aerobic efficiency gain more fat testosterone causes development of lungs girls need fat for growth
Adolescent Contraceptive Use
Recent increase in use
But many Americans, Canadians do not use
Reasons for not using:
concern about image: condoms are for sailors + whores - perception
adolescent risk-taking: more likely to experience heightened emotion - panning isn’t fully developed
Adolescent Contraceptive Use
social environment: expected to have sex + condom wasn’t available
forced intercourse
unrealistic about consequences: don’t realize likelihood of becoming pregnant >50%, decreases as we get older
Characteristics of Sexually Active Adolescents
Personal: Early puberty
Tendency to violate norms: can be a form of acting out
Little religious involvement: religious involvement linked to decreased sexual activity
churches have youth groups adolescents can turn to - open discussions about sex
Family: Step, single-parent, or large family
Characteristics of Sexually Active Adolescents
Weak parental monitoring, parent–child communication - not talking about sex
Peer: hanging out with older peer group, Sexually active
tend to have older siblings that are sexually active
Educational: Poor school performance
Low educational goals: do not expect to do well, not thinking about long term consequences
Talking to Adolescents About Sex
Foster open communication: more likely to be prepared to make good decisions
tell children they should feel open to ask you questions, it can be an ongoing discussion
Use correct terms: demonstrate that you take it seriously, respect discussion
Talking to Adolescents About Sex
Listen, discuss, collaborate: listen first, let them talk about it
Think before talking: think about your approach
Keep conversations going
Internet can be a hazardous educator: they are going to learn about it from peers + internet
more misogynist view + extreme sexual practices as normal
Sexual Orientation
2 - 3% identify as lesbian, gay, or bisexual
Genetic Basis: increased estrogen exposure in prenatal
Maternal heredity: common genetic marker
Stereotypes: tend to act counter-gender early on
fashion - reflection of attitudes toward choice
lower than adults, process of discovering sexuality
individuals are born homosexual
Sequence of Coming Out
Feeling different: ages 6–12: seemed like feelings + attitudes didn’t align, liking gender deviant behaviour
Confusion: ages 11–15: retrospective study - don’t actually differ, find meaning in behaviours
expected to be sexually attractive to girls, engage hetero dating
Sequence of Coming Out
Self-acceptance
timing depends on level of support and culture
self identify as homosexual - report on experience of coming outtiming
Piaget’s Theory: Formal Operational Stage
Hypothetico-deductive reasoning
deducing hypotheses from general theory: thinking of everything possible + narrowing down to what is probable
creating hypothesis of reality + testing them
more able to think like a scientist
pendulum problem: explain speed with varying weights - children start testing, trial + error
Piaget’s Theory: Formal Operational Stage
Propositional thought:adolescents start abstractly - think hypothetically
evaluating the logic of verbal propositions - one true, one false statement - develops in adolescents
children have difficulty evaluating if, then statements
begins + continues to develop as propositions become more complex