Abstract
A combination method of analysis utilizing Tucker's generalized learning curves and three-mode factor analysis is tried out on intercorrelations published by Parker and Fleishman of several measures of performance at several stages of practice on a complex tracking task. The results indicated two measure factors, directional control and sideslip control; four stages of practice factors, very early, middle early, middle late, and very late; and seven factors of individual differences corresponding to combinations of measures and stages of practice factors. The results were clear so that the combination method of analysis has promise for indicating the structure of relations in similar data.