Lifespan Development: Key Concepts, Contexts, and Research Methods (sheilds 12pm)

Ecological Systems Theory and Early Attachment

  • Children develop within nested systems; exposure increases with age.

  • Systems (caregivers, family, school, broader society) can promote or hinder development.

  • Context and interacting systems shape outcomes.

Lifespan Perspective (Baltes)

  • Development is a lifelong, multidirectional process of growth and decline.

  • Plasticity: Development is malleable; gains and losses occur across stages.

  • Focus shifts to the entire lifespan and contextual influences.

Cohort Effects and Historical Context

  • A cohort is a group born similarly, sharing unique historical/cultural events (e.g., wars, technology).

  • Shared experiences shape development differently across cohorts.

Socioeconomic Status (SES) and Access to Resources

  • SES (income, education, occupation) measures resource access.

  • Higher SES: linked to greater opportunities (education, healthcare, enrichment).

  • Lower SES: associated with more stressors (crime, food insecurity), affecting attention and learning.

Stress, Adverse Childhood Experiences (ACEs), and Brain Development

  • Chronic stress (linked to low SES/adversity) impairs prefrontal cortex (PFC) development.

  • The PFC is vital for higher-order thinking, emotional regulation; ACEs predict long-term outcomes.

Culture, Ethnicity, and Identity

  • Culture: shared values/beliefs; microcultures exist within broader ones.

  • Individualism vs. Collectivism shapes perspectives and practices.

  • Ethnicity: social identity (ancestry, language) influences perceptions and responses.

Gender: Biology, Identity, and Social Contexts

  • Gender profoundly influences life outcomes: career, pay, health, lifespan.

  • Modern discussions examine the intersection of biology, identity, and social contexts in gendered development.

Research Methods in Lifespan Development

  • Scientific research (avoiding myths) provides reliable trends.

    • Descriptive research: Observes and records behavior (naturalistic/laboratory observations, case studies, surveys).

    • Example: Substance use survey found first exposure near 14 ext{ years}.

    • Correlational research: Examines relationships; ext{Correlation} \neq ext{Causation}.

    • Experimental research: Establishes causation via controlled variables and comparison groups.

    • Strengths: Infers causation. Limitations: May lack real-world applicability.

    • Ethical considerations: Research with children requires strict oversight (IRB).

    • Principles: Respect for autonomy (informed consent/assent), minimization of risk/harm.

Ethics and Institutional Review

  • Research on children is protected; IRBs ensure autonomy, consent (adults), assent (children with parental consent), and risk minimization.

Looking Ahead: Prenatal Development

  • The next session will cover prenatal development.

Key Takeaways and Connections

  • Development is shaped by interacting, expanding ecological systems.

  • Lifespan perspective emphasizes plasticity, multidirectionality, and lifelong development.

  • Cohorts, historical events, technology, and globalization create unique developmental trajectories.

  • SES, stressors, and ACEs profoundly impact brain development, access to resources, and long-term