A technique for keying items of an inventory to be added to an existing test battery

Abstract

The relative effectiveness of keying inventory items to be added to an already existing battery according to (1) the correlation of the item responses with an external criterion score, and (2) the correlation of the item responses with a residual criterion score was studied. Two sets of keys were constructed on the basis of responses from 155 Ss. The zero-order correlation between the score for each key and the criterion were found to be identical in a cross-validation sample of 154 Ss. When the two scores were combined with others in the test battery, however, the key based on the deviate (residual) scores contributed significantly to the predictive effectiveness of the battery, while the other key did not. (PsycInfo Database Record (c) 2025 APA, all rights reserved)