PSY 290A Lecture Notes - Lecture 24: Longitudinal Study, Construct Validity, Covariance
11 Dec 2016
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Document Summary
How to establish temporal precedence with longitudinal designs - a study in which the same variables are measured in the same people at different points in time. Cross-sectional correlations - in a longitudinal design, a correlation between an earlier measure of one variable and a later measure of another variable. Autocorrelations - in a longitudinal design, the correlation of one variable with itself, measured at two different times. Cross-lag correlations - in a longitudinal design, a correlation between an earlier measure of one variable and a later measure of another variable. Longitudinal studies and the three criteria for causation. Covariance - when two variables are significantly correlated there is covariance. Temporal precedence - longitudinal studies make sure of temporal precedence. Good experiments are the only way to establish causation. Ruling out third variables with multiple regression designs: measuring more than two variables. Regression results indicate if a third variable affects the relationship.
