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Lecture 4 - Coggle Diagram

- - - - Cross-Sectional Design - B/t subjects (different participant groups are used at each age (ex. a group of 10 yr olds, another of 30 yr olds, and another of 50 yrs olds
        
        Pro: Quicker and easier (study can be conducted all at once)
        
        Con: Cohort effects (a group of ppl with a shared experience or common identity not shared by others outside the group (ex. age cohort)
      - Longitudinal Design - W/I subjects (same participant groups are used at each age... follow them for long time)
        
        Pro: Statistical strength (participants serve as their own controls)
        
        Cons: Long time to conduct study, Mortality effects, History effects
      - Sequential Design - Combines aspects of C-S and Longitudinal (fewer particip. groups are recruited and followed across time)
        
        Combines prs and cons from the two other designs