PSYCH 2AA3 Lecture Notes - Lecture 3: Longitudinal Study
12 Sep 2013
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Long study covering the same individuals over the whole time. Cons: cohort effect is still a problem. Cross generational problems; may not be relevant: cost, time, practice effect: ss gets better every time, attribution and selective attrition: mortality and subjects are dropping out for different reasons. Selective attrition: people dropping out due to the experiment. 2 or more longitudinal studies of people with different ages: 2002 2005, some children start at 6 some start at 9. Pros: benefits of longitudinal design but less cost and time: can compare different cohorts at same ages (cohort affect vs age effect, can compare different cohorts patterns of development across time. Cons: complicated, doesn"t completely solve the cohort problem. Intense observation when developmental change is expected to occur. Pros: can watch development as it occurs. Make sure you can define them and know how it works. Propose your own study using each design.
