Reports study of 288 graduate psychology majors to determine what variables correlated with grade point averages in psychology. Reports three clusters of significant variables: (1) high school grades in verbal areas; (2) achievement in college general studies courses; and (3) mathematics aptitude and achievement in college. (CFR)

Discusses increased numbers of undergraduate psychology majors and strategies to reduce them. Proposes a prediction model based on the grade point average of graduating psychology students. Concludes that student performance in introductory psychology courses may provide one predictive measure of later achievement. (CFR)

Provides a brief overview of single-subject research designs. This method exercises its power by examining changes in single subjects' responses over time across experimental conditions. Describes a classroom project in which students collect repeated measures of their own behavior and graph the data. (MJP)