SOCI 217 Lecture Notes - Lecture 7: Cohort Study, Longitudinal Study, Osteoporosis
Document Summary
3rd variable is cause for both iv and dv. 3rd variable is effect of iv and causes of dv. 3rd variable: gender - more common among women spurious. Characterized in temrs of membership in social groupings. Often derive characteristics of social groups from individual members. Observation of a population/event/phenomenon at one point in time. Con: difficult to generalize from observations at one point in time. Observations of a phenomenon over an extended period of time. Examination of changes within population over extended period of time. Examination of specific subpopulations (cohorts) as they change over time. Subjects who experienced a particular event in common. Examination of specific individuals over an extended period. Panel attrition: individuals dropping out due to choice/circumstance. Panel conditioning: people may become overly- conscious to being observed. Asking people about their pasts is another way to approximate observations over time.
