Development of a Japanese Version of the Mini-Cambridge Exeter Repetitive Thought Scale

Abstract

Although repetitive thought is a risk factor for depression, it can also foster constructive consequences. One factor that determines whether repetitive thought is constructive is the processing mode. The Mini-Cambridge Exeter Repetitive Thought Scale (Mini-CERTS) is the only scale to evaluate such processing modes that relate to the abstractness of thoughts. However, there is no scale to evaluate processing modes in Japan. In this study, the Mini-CERTS was translated into Japanese, and we sought to establish a method of evaluating the processing modes of repetitive thoughts. We conducted exploratory factor analysis of data collected from 222 university students and examined internal consistency and criterion validity. Results showed that the Japanese version of the Mini-CERTS (CERTS-J) had only 12 items. These items loaded upon two factors: abstract analytical thinking (AAT) and concrete experiential thinking (CET). AAT showed sufficient criterion-related validity, but CET did not. Nevertheless, higher AAT predicted higher depression, whereas higher CET predicted lower depression. Thus, the CERTS-J can evaluate processing modes and the functionality of repetitive thoughts. Additional research is needed to assess whether the original English items suit the Japanese culture.