PSYCH 2AA3 Midterm: Psych 2AA3 Midterm 1
30 Sep 2015
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Document Summary
Why study children: rapid development, real world applications (e. g. sesame street, lead ingestion) Long-term influences (how do influences affect later development?) Research design: cross sectional design: measures everyone at the same time, compare across age groups, pros, cons: Cohort effect (same historical experiences at same period in life) Can say nothing about how development occurs (e. g. continuous vs. discontinuous) Longitudinal design: one sample observed at several times, several children, comparing individuals: pros, cons: Tells us about developmental course (continuous/discontinuous, can reveal links between early experience and later outcome) Eliminates some aspects of cohort (changes = development, not cohort) Cohort still a problem (cross generational problem) Data may not apply to later/earlier generations. Practice effects (repeated exposure to task may make them good/ bored) Selective attrition (subjects not coming back, high rates, losing certain subjects that affect your results: attrition vs. Contacted them again every year (665, 547, 503, 404)
