Longitudinal predictions of the Brooding and Reflection subscales of the Japanese Ruminative Responses Scale for depression.

The Ruminative Responses Scale (RRS) is a measure of depressive rumination which has two subscales: Brooding and Reflection. This article examines the longitudinal predictions for depression and the test-retest reliability of the Brooding and Reflection of the Japanese RRS. Japanese university students (N = 378) completed the RRS, the Center for Epidemiologic Studies Depression Scale (CES-D), and the Inventory to Diagnose Depression, Lifetime Version (IDDL) which was modified to assess symptoms experienced in the 8-wk. follow-up period. The standardized betas of the initial Brooding and Reflection subscales for the IDDL scores were significant and positive after controlling for baseline CES-D scores, but those for the CES-D scores at Time 2 were not significant. Longitudinal predictions of Brooding were partially consistent with those of other language versions (significant in almost all studies); however, longitudinal predictions of Reflection were not consistent with those of other language versions (negative in previous studies). The test-retest correlations of both subscales were similar to those obtained in Western countries.