Developing and Aging
ACROSS THE LIFESPAN


Biology 266     —     Life Span part 3a

ADULTHOOD:
  • Entering Adulthood:
    • Rites of passage in U.S. are small and numerous, not as clear-cut as in many other cultures
    • U.S. culture celebrates individuality, esp. Frontier influence, "Cowboy culture"
    • In U.S., young adults are still somewhat "carefree"--
        Continued adolescence, esp. in colleges (parties, fraternities, etc.)
    • "Edgework" (danger sports like rock-climbing, kayaking, skiing) reach their peak, then wane
    • College and graduate education-- much more important now than in the past:
      • Over 50% of low income students go from H.S. directly to college
      • ~65% of middle income students go from H.S. directly to college
      • ~80% of high income students go from H.S. directly to college
      • (Rates are much higher than in 1970s; many more also go later as "adult learners")
    • Entering the workforce in full-time jobs (more on this next week)
    • Erikson's stage 6: Adulthood = challenge of Intimacy vs Isolation
      Adults find status in Work, Education, Marriage (sequence order may differ individually)
  • Adult health and strength:
    • Young adults (20s) enjoy lowest mortality rate of any age group
          (#1 cause of death = accidents)
        maximum physical strength;   maximum athletic ability (exception: gymnastics)
    • Lifelong health habits usually formed at this time:
      • Smoking or not
      • Alcohol and its consequences (traffic accidents, binge drinking, sexual assault, cirrhosis, cardiovascular disease later)
      • Good and poor nutritional habits; obesity as a risk factor in many
    • Socioeconomic issues in health:
      • Poverty restricts choices
      • Nonwhites often delay seeking health care when needed
          (they discover cancer at later stages, etc.)
      • Ditto for less educated people of all kinds
      • U.S. has great health care disparities: poor health care for nonwealthy and undereducated (disparities less in most of Europe and other advanced economies)
  • Adult brains and cognitive development
    • Intelligence is made of multiple skills, statistically independent (based on Factor Analysis):
      • Verbal intelligence: Vocabulary, also recognizing similarities and differences among named things
      • Experiential intelligence: Social translation (decoding social situations)
      • "Crystallized" intelligence: Vocabulary, analogies, logic-- Improves with age throuogh adulthood
      • "Fluid" intelligence: Geometric problem-solving; analysis of shapes, series, matrices-- declines with age
      • (Remaining skills show no general longitudinal change)
      • Visual organization (recognizing a figure despite a confusing background (~hunter identifying an animal in camouflage)
      • Auditory organization (recognizing word or tone amidst noise)
      • Short-term acquisition and retrieval
      • Long-term acquisition and retrieval
    • Neuroscience research-- What part of brain is most active for each task?
    • Stages of reflective judgment:
      • Pre-reflective: knowledge (truth) based on:   1 Authority,   2 Direct observation
      • Quasi-reflective: Looking for evidence; questioning truth
      • Reflective: Choosing "most reasonable" explanation, but still open-minded.
    • Formal thought (following rules) vs
      Postformal (also consider subjective and situational factors)
    • Integrating emotions and situational context into decisions--
      Uses emotional intelligence (incl. impressions) to decide "who is a good employee?"
      Increased use of emotions past age 30
      Younger adults change their impressions of others more readily than older adults.
  • "What do you want to be?"-- creating your life story
    • Most young adults build a Life-span story or scenario (an internal narrative)
      Where I came from;   What I am now;   My future goals (and social clock)
      Generally, this is a more long-range view (15-30 year future rather than 1-2 year as in adolescence)
    • Job and Career development is central; so is Family development
  • Control of one's life:
    • Primary control-- Beliefs about controlling the external world; wanting to be in charge of others
    • Secondary control-- Beliefs about controlling internal self; wanting to be in charge of self
    • Our ability to control others often declines with age; ability to control self often grows.

ADULT RELATIONSHIPS:
  • Adult personality issues: Intimacy, flexibility vs inflexibility
    Self-image ("What am I?"):
        in men usually career or job-related; in women, family also or primarily
  • Jobs and careers:   Dedication to Job (each task) vs Employer vs My Career
    Self-image: Pride in work--         Example of Submarine sandwich (hero sandwich) maker
            who says,     "My sandwich is a work of art"
  • Friendship: --general characteristics
    • 1. Emotional connection
    • 2. Common (shared) interests
    • 3. Sociability, compatibility-- nice to be with
    • Includes siblings who remain very close, even at a distance (phone often, visit when able)
  • Love (and marriage):
    • Based on:
      • 1. Passion (physiological desire)
      • 2. Intimacy (willingness to be emotionally close)
      • 3. Long-range commitment
      • Enduring relationships show increased emotional intimacy and increased commitment with time, even as passion diminishes
    • Positive assortative mating (marrying similar to yourself) is usually easier, more enduring
      Negative assortment sometimes ("opposites attract")
      Personalities & beliefs usually more important that external variables (ethnicity, race)
    • "What is a wedding? It's a test!"--
      Couple (with family help) must plan a big celebration and keep everyone happy;
      -- if they can do this, society then approves, lets them get married & have children together!
      It's easier if the families get along, have more shared traditions, and respect each other.
      More family support (bigger wedding) generally predicts more enduring marriages
          (up to a point; business associates and >100 guests don't really count)
    • Neuroscience and love: Oxytocin, dopamine, endogenous opiates all very active
        Oxytocin ("cuddle hormone") especially important: strongest between mother and infant,
        but also between spouses, between father and children, even people and their pets.
    • Violence and abusive relationships-- usu. men against women (sometimes among lesbians)
      "Battered woman syndrome"-- courts may be lenient on women who finally kill their abusers
      Higher rates of marital violence in some cultures, including "honor killings" of women
  • Singlehood as a choice: Career related in some; financial advantages; "Millenials" more often
      --but this may be temporary, and may give way to delayed marriage (a growing trend by itself)
      Studies show that married people live longer than never-married or formerly married
  • "Cohabitation"-- As room-mates (mostly in younger adults; seldom lasts)
    Sex without marriage: Tends to be much less stable than marriage; frequency and acceptance vary culturally;   often transitions into marriage, especially when children are born.
  • LGBTQ relationships-- Mostly similar to married or cohabiting heterosexuals, but poorly studied (few examples until recently)
  • Course of marriage:
    • Early years-- Marriage becomes stronger if:   1. Expectations are realistic;   2. Partners are supportive of each other
    • Children add to everyday stresses-- strengthens healthy marriages, but weakens those already weak or troubled
    • Financial or job-related hardships may also strain marriages
    • Staying happy in marriage:   1. Remain supportive   2. Talk things out
        3. "Each partner gives in 90% of the time"   (See also page 372 top)
  • Family dynamics (and variations):
    • Nuclear family (typical in U.S.) vs Extended family -- many variations
    • Compared with past generations, today's adults:   1. marry later,   2. have children later,  
        3. have fewer children,   4. may have no children or stay single
    • Single parents (can be never-married, divorced, or widowed)--
        increasingly common;   usually many financial burdens
    • Very large families:   Older children given more responsibility;  
        Oldest girl often becomes "mother's helper"
    • Step-parents: relationships vary greatly; some become very close (may adopt), others not
    • Foster parents (temporary); hard on children when childhood is unstable
    • Adoption (permanent): as good or better than natural parents (many studies show this)
    • Same-sex parents: apparently OK if couple is in loving, commited relationship,
        but needs more study (few examples until recently)
  • Divorce (and remarriage):
    • Rates vary (Asians least)
    • Conflicts predict early divorces. Negative effects long lasting (financial, emotional).
    • Effects always very hard on children; lasting; higher divorce rates in their marriages
    • Child custody: Often mother only (traditional), but frequent financial hardship
        Joint custody is often best, but requires repeated negotiation.
    • Remarriage usually introduces further complications, esp. in parenting practices.



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Syllabus
rev. Aug. 2020