Use of change scores in redundancy analyses of multivariate psychological inventories

Abstract

Both canonical and multiple-regression redundancy analyses were computed on the 20 separate subscale change-scores for the Eight State Questionnaire (8SQ) and the Differential Emotions Scale (DES-IV), using a sample of 212 undergraduate students. In comparing the measurement overlap of the two measures, it was important, since state-change dimensions were of interest, that across- occasions difference scores be used rather than single-occasion absolute scores. Viability of this approach was demonstrated and only minor redundancy was evident for the 8SQ and DES-IV instruments. On the present evidence, it appears that both inventories are tapping essentially discrete psychological variance (al..