Developing and Aging
ACROSS THE LIFESPAN


Biology 266     —     Life Span part 2e

ADOLESCENCE:
  • Physical maturation, puberty
    • More sudden and dramatic for girls--         Reproductive system, incl. monthly cycles
      • Menarche (onset of menstruation) usu. occurs around 100 lb (45 kg) weight
      • Age has been declining historically (~age 18 in 1890s); younger in many African Americans
      • Many girls anticipate and look forward to this
      • Hastens privacy; emotional connections to other girls with similar experience
      • As breasts develop-- more interest in appearance, attractiveness;
        wanting boys to be interested in them
    • In boys, more gradual, less to discuss (maybe shaving or growing a mustache)
    • Growth spurt: Earlier in girls (girls taller than boys ~age 15) but lasts longer in boys
    • Physical growth: larger appetite (protein, calcium needed);   some nutritional problems emerge or get worse: obesity, anorexia, bulimia           Anorexia
    • Physical ability and sports skills increase
    • More risk-taking, so more accidents, incl. death (autos, guns, suicide), also alcohol abuse, unwanted or unprotected sex
    • Brain growth: More abilities but less inhibition-- more impulsive, risk-taking (esp. boys)
    • Memory skills improve; also logical skills and problem-solving--
      Better understanding of math, science, philosophy, politics
  • Kohlberg and moral reasoning:
    Preconventional
    (based on punishment & reward)  
    1. Obey authority
    2. Be nice; get rewards, not punishment
    Conventional
    (based on social norms)
    3. Do what others expect
    4. Follow rules that maintain social order
    Postconventional
    (based on moral codes)
    5. Social contracts (when valid); ~Kant's "categorical imperative"
    6. Moral system based on abstract principles
    • Criticism of Kohlberg: doesn't account for divided loyalties (to group vs principles), esp. among adolescents: clubs, gangs, other group loyalties
    • To promote moral reasoning:
      • Discussion
      • Religious groups and communities
      • Choose your friends wisely-- Parents should ask about friends and encourage those who are good influences while discouraging those who are bad influences.
  • Rites of passage (transitions to more adult roles):
    • Menarche ceremonies in a few societies (Apache)
    • Bar/Bat Mizvah
    • "Work papers" for legal employment
    • "Quinzeana" in Latin America
    • "Sweet sixteen" or "Coming out"
    • High School prom
    • Graduation
    • Driver's license
    • Drinking age
    • Voting age

TEENS BECOMING ADULTS:
  • Teenage identity and self-esteem:
    • General characteristics:
      • Wants adult privileges (own initiative), but still wants parental support (as child)
      • Internal conflict (turbulence) and self-doubt; "Storm and Stress" ("Sturm und Drang")
          (This is minimized by loving family support)
      • "Adolescent egocentrism": feels empowered, oblivious to negative aspects (dangers) and long-range prospects
      • Feels invulnerable, invincible; willing to take risks
          (Common risks: drinking, smoking, drugs, unsafe sex, unsafe driving, extreme sports)
      • Personal fable: "I'm the only one who has ever experienced this or felt this way"
      • Imaginary audience: "They're all watching me",   "Hey, look at me!"
          Girls as "beautiful princess"; boys "showing off", "death-defying" stunts
          Boys as "rock stars" or star athletes; girls as the preferred choices of rock stars or star athletes
    • Self-esteem: affected by parents, peers, social or ethnic identity;
        Girls often more sensitive; low self-esteem may lead to depression and suicide
    • Ethnic identity (important for many teens but not all): connecting with traditions
    • Parenting of teenagers is hard:
      Demands and needs keep changing from dependent to independent and back.
      Often rebellious: can be harmless (clothing choices, music)
              or harmful (drugs, alcohol, unsafe sex, etc.)
      Authoritarian parents often lose control at this time (esp. if teen moves away)
  • Building an adult identity-- Four approaches (statuses):
    • Diffusion-- plays games and puts off decisions
    • Foreclosure-- conforms to long-standing parent wishes and expectations
    • Moratorium-- changes mind frequently among alternatives
    • Achievement-- Having explored alternatives, "I found what I really want, what I'm good at"
  • Romance and sexuality:
    • Dating and romance: begins earlier if family ties are weak; varies ethnically, also individually
        Girls are often socially more mature; boys are awkward at first
        Couple alone (or "double-dating") vs "hanging out" in a large group (not paired)
    • Sexual behavior varies:
      • Boys: seek and report positive enjoyment (seldom any regrets, no long-range plans)
      • Girls: seek love, intimacy, long-range commitment; often disappointed or conflicted
      • Alcohol use and poverty both predispose to earlier sexuality
      • Good grades, good social adjustment predispose to later sexuality
    • Teen pregnancy (usually improper use or no use of birth control): multiple bad outcomes
    • Date rape, dating violence: All outcomes bad
    • Same-sex (homosexual) attraction:
      Reasons and consequences poorly understood. A few differences in brain structure have been reported, but it is unclear if these are the causes or the consequences.

  • Seeking employment
    • Often starts with casual part-time or summer work (easy entry if family runs a restaurant or farm)
    • Career choice-- Donald and Super-- 3 phases:
      • 1. Crystallization ("What am I good at?)
      • 2. Specification (seeks training)
      • 3. Implementation (get a job, or decide to change jobs)
    • Personality-type career theory (John Holland, see table page 304 top):
      "Work is fulfilling when it fits my personality"

    • Social-cognitive career theory--   Repeated (iterative):
        Interests, goals ——> Try it out ——> Success/failure ——> Beliefs about self & outcome⤵
          🡑—— New interests/goals <————————————————(repeat)———————⤶
    • Some career choices based on "What I want to avoid" (gravitate to what I see that avoids it)
    • Part-time work (OK if only occasional or summer, otherwise interferes with school)
      Often long hours or inconvenient times-- schoolwork suffers
      Frequent behavioral and mental health problems, also sleep problems, poor health outcomes
      Some immaturity at spending money quickly for self-gratification (not saving for future)-- this varies
  • Teen problems:
    • Alcohol: leads to bad coping skills, traffic accidents, sometimes date rape
    • Smoking and vaping: often by succumbing to peer pressure; also leads to bad coping sklills, poor lung health (incl. cancer, bronchitis, emphysema)
    • Depression and suicide-- Major cause of death among teens!
    • Girls: casual sex as an outlet, or as imagined control of boys
    • Delinquency, truancy, crime
  • Risky and destructive behaviors:
    • Alcohol
    • Smoking (incl. vaping)
    • Drugs
    • Unsafe sex
    • Unsafe driving
    • Extreme sports



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Syllabus
rev. Aug. 2020