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Research Methods in Lifespan Development — Previous Year Questions

📊 Overview​

  • Frequency: 14 questions | Papers: 12/27 | 🟡 Medium Priority
  • Most common: Obstacles in studying lifespan; research methods (longitudinal, cross-sectional, sequential)

📝 Master Answer (250 words / 6 marks)​

Q. Discuss the various methods and obstacles in studying life span development. (6 marks)​

Research Methods in Lifespan Development

  1. Cross-Sectional Method: Different age groups are studied at the same point in time. Example: comparing 20-year-olds, 40-year-olds, and 60-year-olds simultaneously. Advantage: Quick and inexpensive. Limitation: Cohort effects — age groups grew up in different historical periods, so differences may reflect generational differences rather than development.

  2. Longitudinal Method: The same individuals are studied repeatedly over a long period. Advantage: Shows genuine change within individuals; eliminates cohort effects. Limitation: Expensive, time-consuming, subject to attrition (dropout), and practice effects.

  3. Sequential (Cross-Sequential) Method: Combines both approaches — multiple cohorts are followed longitudinally. Separates age effects, cohort effects, and time-of-measurement effects.

  4. Time Lag Method: Compares same-aged individuals from different time periods (e.g., 30-year-olds in 1990 vs 30-year-olds in 2020). Used to study sociocultural change effects.

Obstacles in Studying Lifespan Development

  1. Ethical constraints: Cannot experimentally manipulate human development
  2. Attrition: Longitudinal studies lose participants over time — survivors may not be representative
  3. Cohort effects: Cross-sectional comparisons confound age and generation
  4. Self-report limitations: Retrospective recall of early life events is unreliable
  5. Cultural bias: Most research conducted in Western, educated, industrialised, rich, democratic (WEIRD) contexts
  6. Multidisciplinary complexity: Integrating biological, psychological, and social data is methodologically challenging
  7. Reactivity: Repeated measurement may influence participants' behaviour

Related Content: 📚 Research Methods — Development & Obstacles

📅 Key Previous Year Questions​

  • Short note: Obstacles in studying lifespan development (multiple years)
  • 2018-December: Methods and obstacles in studying lifespan development
  • 2016-June: Special techniques and obstacles in lifespan development research
  • 2014-December: Research methods in lifespan psychology

💡 Exam Tips​

  • This topic most commonly appears as a short note on obstacles — prepare a tight 100-word version
  • For Section B questions, combine methods + obstacles using sub-headings
  • Name all four methods (cross-sectional, longitudinal, sequential, time lag) — many students forget the last two