TECHNIQUE FOR MINIMIZING THE INSTRUMENTAL FACTOR

A technique is described for using orthogonal factor scores to compare the item-scores obtained from two or more media so as to minimize the instrumental factor problem. It is compared with the hypothesis matrix technique using the item-scores of a behavior rating scale and a structured psychiatric interview scale. The direct factor score method proved to be more effective in several aspects, mainly because it yielded larger loadings and, therefore, resulted in the extraction of more and better delineated factors.