A model was developed for estimating individuals' true changes on test scores using the additional information provided by an auxiliary variable correlated with a trait being measured. This provides an improved and more precise estimate when compared with simple difference scores. It involves the reliability of "X" scores only. (SLD)

This study examined career teachers' allocation of extra work time within a conceptual framework influencing time use. Distinct groups prefering instructional tasks; student, or parent, counseling; or committee activities were identifiable in a prediction model. Teachers selected professional time uses congruent with their perceived skills and…

Common factor scores were compared to unfactored data-level variables as predictors in terms of the correlation of a criterion with the predicted value in multiple regression equations applied to replication (cross-validation) samples. (Editor)

Thirteen predictors of self-reported high school leadership were investigated using data from the Project TALENT sample of high school seniors. The high school leader was characterized as mature, interested in business management, self-confident, socially sensitive, vigorous, and having high socioeconomic status. Cognitive variables were not…