[Development of the Japanese version of the Thought Control Ability Questionnaire and evaluation of its reliability and validity]

Intrusive thoughts and difficulty in controlling thoughts are common, not only for people with psychological disorders, but also for healthy people. Individual differences in thought control ability may underlie such problems. The Thought Control Ability Questionnaire (TCAQ), which consists of 25 items, was developed by Luciano et al. (2005) in order to measure individual differences in the perceived ability to control unwanted intrusive thoughts. The purpose of the present study was to develop the Japanese version of the TCAQ and evaluate its reliability and validity. We translated the English version of the TCAQ into Japanese. We also conducted confirmatory factor analysis with a one factor solution, similar to the previous study. Based on the analysis, we excluded items whose factor loadings were lower than .30, resulting in 22 items for the Japanese version of the TCAQ. The model exhibited acceptable goodness-of-fit. The Japanese version of the TCAQ also demonstrated good reliability as well as evidence of construct validity. Thus, the development of the Japanese version of the TCAQ was successful.