Development Across Lifespan - Comprehensive Study Notes

Course logistics and quick recap

  • Online lecture for Development Across Lifespan posted (time code ~09:11). An associated assignment is available. The due date for the assignment is the day before the test at midnight, mirroring the prior content/tests.
  • Instructor asks for confirmation on deadline to avoid rushing right before the test. General consensus: okay.
  • Student questions/issues about the assignment submission:
    • Some students could not fill out the online form; attempted to download Word and PDF formats; one report suggested an iPad/formatting issue. Instructor to investigate and fix the file formatting so it’s “billable.”
    • Workarounds mentioned: screenshot the item and annotate by hand (on a phone or print), then submit as an image (JPEG). Windows-only submissions preferred; Mac files may not open for grading. A student submitted a Mac file for a prior assignment and was asked to resubmit as Word.
    • Reminder: if you cannot access the file, consider a screenshot with handwritten answers, submitted as an image file.
  • Additional note from instructor: there is a tile with videos and “additional resources” on development (videos about parenting styles, DHA, schemas). If you haven’t watched, go back and view; the content will be relevant to the homework.
  • Quick correction offered during the session: a misstatement in Piaget’s stages—sensory-motor stage does develop object permanence; the child learns that objects exist even when out of sight. Peekaboo is an example illustrating the development of object permanence.
  • The focus of today’s session: adolescent development and adulthood, continuing through Erikson’s psychosocial stages, Piaget-related cognitive development, and Kohlberg’s moral development.
  • Reminder to review the earlier sections (prenatal development and infancy) if you haven’t yet, and to consult the slides for videos in the development tile.

Key concepts: Piaget and sensorimotor stage (object permanence)

  • Sensorimotor stage (Piaget, infancy): babies explore the world with senses and actions; learn through interaction with objects and the environment.
  • Object permanence: understanding that objects continue to exist even when not visible. Early on, infants may act as if out of sight = out of existence; over time, they develop the expectation that hidden objects still exist.
  • Correction highlighted: during the sensorimotor stage, object permanence develops; this is why phenomena like peekaboo are revealing about infants’ growing understanding of obtaining knowledge about the world.
  • Related note: Piaget’s stages were discussed in the context of how cognition becomes more complex from infancy through later stages (leading into adolescence and adulthood).

Adolescence: physical, neural, psychosocial, and cognitive development

  • Timeline: adolescence begins as childhood ends and extends roughly into late teens/early adulthood, with variability across individuals.
  • Puberty as the defining physical change: marks transition to adolescence and biologically signals maturation.
    • For girls: puberty typically ranges from age 88 to 1616 (transcript uses this range).
    • For boys: puberty is described in the transcript as “from nine to eight,” which appears to be a transcription error; commonly cited ranges are roughly from the early to mid-teen years with variability. The key point: puberty is influenced by environment and biology.
    • Environmental influences: stressful environments can trigger earlier menarche in girls; environmental impacts on puberty in boys are less clearly identified in the transcript.
  • Brain development during adolescence:
    • Frontal cortex (prefrontal cortex) is still maturing during adolescence and does not fully develop until around age 2525.
    • Limbic system (emotional/motivational centers) tends to be more active during adolescence, contributing to heightened risk-taking and emotional reactivity.
    • Consequence: adolescents may rely more on the limbic system for decision-making while the prefrontal control is still under development, leading to increased risk-taking and impulsivity compared with adults.
  • Cognitive and psychosocial changes:
    • Egocentrism persists in adolescence in some form (self-focused perspective) but evolves alongside biology and social experiences.
    • Identity exploration becomes central: questions about who I am, my values, beliefs, goals, and place in the world.
    • Cultural context matters: Western cultures (e.g., U.S.) emphasize independence and individuality; some Asian cultures emphasize community and assimilation, affecting how adolescents construct identity.
  • Erikson’s psychosocial framework (adolescence-focused component): identity vs role confusion
    • Core question: “Who am I?” and “What do I want to become?”
    • Successful development -> strong sense of identity and independence; unsuccessful -> role confusion, uncertainty about future roles and self.
  • Erikson's lifespan integration (brief cross-section): stages extend beyond adolescence into adulthood, with earlier crises setting a foundation for later ones.
  • Erikson’s stages overview (eight stages): from birth to late adulthood, each with a key psychosocial crisis and potential positive/negative resolutions. The following sections provide a concise per-stage outline (ages are approximate and context-dependent).

Erikson’s eight psychosocial stages (key crises and resolutions)

  • Stage 1: Trust vs. Mistrust (birth to ~1 year)
    • Core crisis: are my basic needs met reliably (feeding, comfort, response to cries)?
    • Possible outcomes: trust (world is safe/predictable) vs mistrust (world is unsafe/uncertain).
    • Positive resolution: develops a sense of trust in others and the environment; negative resolution: anxiety, hypervigilance, and insecurity.
  • Stage 2: Autonomy vs. Shame and Doubt (1–3 years)
    • Core crisis: can I do things myself or must I rely on others?
    • Positive resolution: autonomy, self-confidence in making simple choices (e.g., choosing which toy to play with); negative resolution: shame and doubt about one’s own abilities.
  • Stage 3: Initiative vs. Guilt (3–5 years)
    • Core crisis: taking the lead and initiating activities with others.
    • Positive resolution: initiative, ability to plan, lead, and execute activities; negative resolution: guilt about acting on one’s plans without permission.
  • Stage 4: Industry vs. Inferiority (5–12 years)
    • Core crisis: mastering new skills and comparing oneself to peers.
    • Positive resolution: industry, confidence in learning new skills; negative resolution: inferiority and reduced self-esteem if faced with persistent failures or harsh feedback.
  • Stage 5: Identity vs. Role Confusion (adolescence)
    • Core crisis: forming a personal identity and determining one’s role in society.
    • Positive resolution: strong sense of identity and autonomy; negative resolution: role confusion and uncertainty about future directions.
  • Stage 6: Intimacy vs. Isolation (early adulthood)
    • Core crisis: forming close, committed relationships while maintaining a sense of self.
    • Positive resolution: intimacy, deep connections; negative resolution: isolation and loneliness.
  • Stage 7: Generativity vs. Stagnation (middle adulthood)
    • Core crisis: contributing to the next generation and leaving a legacy; or feeling unproductive.
    • Positive resolution: generativity (mentoring, helping, contributing to community); negative resolution: stagnation and a sense of unfulfillment.
  • Stage 8: Ego Integrity vs. Despair (late adulthood)
    • Core crisis: reflecting on life and its meaning; accepting mortality.
    • Positive resolution: ego integrity (meaningful life, acceptance, wisdom); negative resolution: despair, regret, bitterness about life choices.
  • Practical notes on Erikson:
    • Stages are interconnected; successfully resolving earlier crises can facilitate later stages, but later crises can still be revisited or resolved with support (therapy, reflection, etc.).
    • Not all individuals neatly finish one stage before moving to the next; life events can shift trajectories or require revisiting earlier resolutions.

Cognitive development in adolescence: egocentrism and Kohlberg’s moral development

  • Adolescent cognitive features (as described in the transcript):
    • Egocentrism: a tendency to view the world from one’s own perspective; includes two classic manifestations.
    • Personal fable: belief that one is unique or invulnerable; “it won’t happen to me.”
    • Imaginary audience: belief that others are constantly watching and judging them.
    • These cognitive tendencies contribute to heightened self-consciousness and risk-taking behaviors in adolescence.
  • Kohlberg’s moral development framework (three levels):
    • Focus: how moral reasoning evolves with age and experience, using moral dilemmas to classify reasoning.
    • Three levels {
    • Preconventional: morality driven by consequences to the self; avoiding punishment or seeking rewards; concrete self-interest.
    • Conventional: morality determined by social norms, rules, and the desire to maintain social order and gain approval.
    • Postconventional: morality guided by personal principled ethics, which may override conventional norms and even laws when they conflict with principles of justice or human rights.
      }
  • Heinz dilemma (Kohlberg’s moral dilemma example used in the lecture):
    • Scenario: A woman with cancer is dying; a drug that could help her exists but is expensive; the husband cannot afford it after trying many sources; pharmacist refuses to lower price or permit delayed payment; husband contemplates breaking into the pharmacy to steal the drug.
    • Debates and viewpoints explored in class:
    • Some students support breaking in to save his wife, risking legal consequences.
    • Others oppose stealing, citing the harm to property rights and legal constraints.
    • Considerations include potential outcomes (drug might work or cause harm), other avenues (fundraising, GoFundMe, appeals to empathy, legal action), and the moral weight of saving a life versus breaking the law.
    • Important teaching point: there is no single objectively correct answer; the exercise demonstrates how moral reasoning evolves and how people justify actions using different ethical lenses.
  • Kohlberg’s three levels applied to the Heinz dilemma (conceptual mapping):
    • Preconventional level: morality judged by consequences; avoid punishment or seek personal gain.
    • Conventional level: morality judged by social expectations, rules, and laws; maintain social order.
    • Postconventional level: morality judged by internalized ethical principles; may override laws when they conflict with fundamental rights or justice.
  • Additional notes: the instructor notes that “law” and “morality” can diverge; individuals may prioritize moral principles over legal rules, or vice versa, depending on their values.

Emergent adulthood and adulthood: later life stages and key milestones

  • Emerging adulthood (late teens through twenties): markers of adulthood (e.g., driving, career establishment, marriage) are occurring later; people explore identities, goals, and roles with more flexibility and fewer external pressures.
  • Young adulthood and beyond:
    • Early adulthood: continued exploration and establishment of independence and relationships; responsibilities begin to increase (career, partnerships).
    • Middle adulthood: physical changes—declines in muscle mass, bone density, eyesight, and hearing; slower information processing and motor responses; cognitive changes are present but can compensate with experience and strategies.
    • Older adulthood: more pronounced physical changes (graying hair, wrinkles); frontal lobe shrinkage; slower to learn new information but can retain and utilize existing knowledge; focus shifts toward meaning, close social circles, and life review.
  • Marriage and long-term relationships:
    • Marriage commonly associated with multiple benefits (physical, mental, financial) but you typically observe an overall link to greater life satisfaction when marriages are happy.
    • Marital satisfaction often follows a U-shaped curve: tends to dip after childbirth due to sleep deprivation, stress, and adjustments, then rises again as children leave home.
    • Communicating about roles and responsibilities before having children can reduce conflict and increase marital satisfaction during child-rearing.
  • Parenthood and adulthood:
    • Having a child can bring meaning and growth but can also strain relationships and increase stress.
    • The impact of parenting on marital satisfaction is complex and often shows a dip during the child-rearing years with recovery afterward.
  • Practical implications:
    • Across adulthood, meaning and fulfillment may become central themes; social connections and purpose become increasingly important.
    • The presence of a supportive partner and clear division of responsibilities can mitigate stressors associated with family life.

Cross-cultural perspectives and contextual relevance

  • Cultural emphasis on individualism versus collectivism affects how adolescence and identity formation are navigated.
    • Western emphasis on independence and uniqueness may push for a stronger emphasis on personal identity.
    • Some Asian cultures emphasize community and harmony, with a focus on contributing to family and society rather than emphasizing uniqueness.
  • These cultural lenses influence how psychosocial stages, identity formation, and life goals are experienced and prioritized.

Real-world relevance, ethical and practical implications

  • Adolescence as a biologically driven period of risk and exploration: biology (developing PFC) interacts with environment to shape decision-making and risk tolerance.
  • Education, parenting, and policy implications:
    • Understanding puberty and adolescent brain development can inform parenting strategies, education design, and public health messaging.
    • Warns against overreliance on adolescence as a period to impose adult-like expectations; supports gradual autonomy with age-appropriate responsibilities.
  • Moral development in practice:
    • Kohlberg’s framework offers a lens to discuss moral reasoning in real-world dilemmas (e.g., healthcare access, pricing, and ethical business practices).
    • The Heinz dilemma illustrates how rationales differ and why conversations about ethics can be nuanced and context-dependent.

Practical notes for exam preparation

  • Be able to identify Erikson’s eight stages and the core psychosocial crisis of each, plus the positive/negative outcomes and how environment and experiences influence resolution.
  • Understand Piaget’s sensorimotor stage development and the concept of object permanence, including real-world cues (e.g., peekaboo) used to illustrate the development.
  • Articulate how adolescent brain development (prefrontal cortex maturation, limbic system activation) contributes to risk-taking and social behavior, and how this links to identity formation.
  • Explain Kohlberg’s three levels of moral reasoning and exemplify each with the Heinz dilemma or similar scenarios; know the distinction between conventional norms and postconventional principled ethics.
  • Recognize the general life-span progression from adolescence to adulthood and later life, including emerging adulthood, middle age, and older adulthood, with key physical, cognitive, and social changes.
  • Be prepared to discuss cross-cultural differences in identity formation and the role of societal norms in shaping development.
  • For course logistics: know the assignment submission issues discussed and the recommended workarounds (e.g., screenshot with handwritten answers) and the platform requirements (Windows vs Mac submissions).

Quick reference: key ranges and terms (from the lecture)

  • Puberty (adolescent physical changes):
    • Girls: 8extto168 ext{ to } 16 (as stated in the transcript; note there is variation and the source mentions possible environmental influences).
    • Boys: described in the transcript as “nine to eight” (likely a transcription error; typical ranges in literature are broader and variable).
  • Neural development reference point:
    • Prefrontal cortex maturation: around age 2525.
    • Limbic system: more active during adolescence, contributing to risk-taking tendencies.
  • Erikson’s stage sequence (names only): Trust vs Mistrust; Autonomy vs Shame; Initiative vs Guilt; Industry vs Inferiority; Identity vs Role Confusion; Intimacy vs Isolation; Generativity vs Stagnation; Ego Integrity vs Despair.
  • Kohlberg’s levels of morality: Preconventional; Conventional; Postconventional.
  • Core examples from Kohlberg: preconventional (avoid punishment/self-interest), conventional (social approval and rule-following), postconventional (internal ethical principles, sometimes overriding laws).

If you’d like, I can reorganize these notes into a printable study sheet or create a condensed one-page cheat sheet focusing on key terms and stage-specific bullet points for quick review before the exam.