The REIm-13: a brief measure of thinking style.

The Rational-Experiential Multimodal Inventory (REIm) is a recent tool showing promise in the measurement of self-reported thinking style - preference for rational or experiential processing - and offers three-faceted measurement of the latter. We present the first short form of the measure, the REIm-13, and test its factor structure, reliability, and validity in a large community sample. Participants were N = 920 Australian adults (502 females) who completed an online survey (N = 510 of whom participated in a follow-up survey). In addition to the REIm, participants completed a Big Five personality measure. The internal consistency of the REIm-13 was acceptable given the limited number of items (.52-.68). Furthermore, test-retest reliability was high (ρ =.64-.74) for the theorized four-factor and two-factor solutions. Construct validity was established by examining the relationship between short-form and full REIm factors (ρ =.65-.71), and the validity of composite scoring was confirmed against factor scoring. Relationship with age (a slight negative relationship to both main scales), gender (females reporting higher Experientiality, males higher Rationality), and Big Five variables largely followed previous findings, demonstrating concurrent validity. The study demonstrates that the REIm-13 provides sound measurement of thinking style.