The White Bear Suppression Inventory (WBSI) focuses on failing suppression attempts

Abstract

Experimental studies have produced evidence to suggest that suppressing unwanted thoughts paradoxically results in even more unwanted thoughts. Therefore, suppression is considered to be an inadequate control strategy. Wegner and Zanakos (1994; Journal of Personality, 62, 615–640) introduced the White Bear Suppression Inventory (WBSI) as a measure to identify people who chronically tend to suppress unwanted thoughts. However, recent studies suggest that the WBSI does not exclusively measure thought suppression, but also addresses the experience of intrusive thoughts. Hence, the WBSI does not seem to measure suppression per se, but rather failing suppression. Three studies elaborate on this idea. In study 1, factor analysis of 674 non‐clinical WBSI scores is found to support the hypothesis that the WBSI addresses both suppression and intrusion. By and large, study 2 replicates these findings in a clinical sample (N=106). In study 3, an alternative suppression questionnaire is introduced, focusing on suppression and intrusions, but also on successful suppression. It is concluded that the WBSI, and thought suppression research in general, is biased toward failing suppression attempts, and has ignored the possibility of successful suppression. Copyright © 2003 John Wiley & Sons, Ltd.