Development of the Self-Other Focused Thinking Error Scale (SOFT) in Depression(Symposium/How Can Psychotherapy Exercise Its Power to Move the Society Forward?)

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  • 抑うつにおける推論の誤りを測定する自己・他者志向的誤推論尺度(Self-Other Focused Thinking Error Scale:SOFT)の作成
  • ヨクウツ ニ オケル スイロン ノ アヤマリ オ ソクテイ スル ジコ ・ タシャ シコウテキ ゴスイロン シャクド(Self-Other Focused Thinking Error Scale : SOFT)ノ サクセイ

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Abstract

Objectives : The aim of this study was to develop the brief version of thinking error questionnaire and to confirm its reliability and validity. Subjects and methods : Subjects were 325 normal undergraduate and technical college students (male=158, female=167). All participants completed the brief version of thinking error questionnaire with 20 items. One hundred twenty three of them completed the self-rating questionnaire for depression (SRQ-D), 38 subjects completed the stress response scale (SRS-18), and 157 subjects completed the state-trait anxiety inventory (STAI) and brief version of stress coping questionnaire. Factor analysis using the promax rotation method was carried out. Then, Pearson correlation coefficients between the brief version of thinking error questionnaire and other questionnaires were calculated. Results : The results of factor analysis revealed that the brief version of thinking error questionnaire which was made in this study had two factors. The questionnaire was named "Self-Other Focused Thinking Error Scale" (SOFT). The first factor was named self-focused logical thinking error. The second factor was named other-focused logical thinking error. Cronbach's α indicated that SOFT had enough reliability. The results of Peason correlation coefficients were such that, positive correlation between the first factor and state anxiety, trait anxiety, stress response. The negative correlation between the first factor and the amount of stress coping was also showed. The second factor and trait anxiety showed a positive correlation ; however, other combinations between the second factor and other questionnaires did not reach significant correlations. The different pattern of correlation was defined by two different factors of focusing of logical thinking error which were self-focusing and other-focusing. The results of total score were identical with the results of the first factor. The results of total score indicated that SOFT had high validity. Conclusion : The resultant 10-item SOFT was obtained. The SOFT could test the tendency of the logical thinking error. Further research using SOFT in clinical samples is needed.

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