APA Dictionary of Psychology

a method in exploratory factor analysis for understanding the major underlying dimensions of variables for a given person over time. In this approach, a single individual or unit is measured repeatedly on a broad range of variables, the variables are correlated over the series of occasions sampled, and the correlation factor is analyzed. For example, a set of memory tests may be administered to a person at several points in their life; P-technique factor analysis could then be used to identify dimensions of change or patterns of covariation among the variables across occasions. Also called P factor analysis. Compare Q-technique factor analysis; R-technique factor analysis.