統合失調症患者に対する修正版 The Tinkertoy Test の信頼性および妥当性の検討

Abstract

要旨：統合失調症患者への発散的思考検査として，修正版 The Tinkertoy Test(TTT)採点基準の実用性， 信頼性と妥当性を検証した。修正版 TTT，デザイン流暢性検査(Design Fluency Test：DFT) ，アイディ ア流暢性検査(Idea Fluency Test：IFT) ，統合失調症認知機能簡易評価尺度(The Brief Assessment of Cognition in Schizophrenia：BACS)内のロンドン塔課題を実施した。統合失調症群 45 名，健常群 35 名 を対象とした結果，統合失調症群は検査成績が有意に低かった。次に修正版 TTT 採点基準の Cronbachʼs α係数は統合失調症群 0.82，健常群 0.81 であり，対象によらず一貫して測定可能であることが示された。 また修正版 TTT 総合計点と DFT，IFT 間の相関分析から有意な正の相関が複数の項目で認められ，基準 関連妥当性が確認された。これらの結果から，修正版 TTT は信頼性および妥当性を有し，統合失調症患 者の発散的思考検査として有用であることが示唆された。 (高次脳機能研究 39(1) ：10 ～ 17，2019) Key Words：統合失調症，修正版 The Tinkertoy Test(TTT) ，発散的思考検査，信頼性，妥当性 schizophrenia，Modified The Tinkertoy Test，divergent thinking test，reliability，validity

Divergent thinking as a predictor of life skills in patients with schizophrenia: Evidence from the modified Tinkertoy Test

“…The latter evaluated the spontaneous initiation, planning, execution, and monitoring of tasks in a free‐form context, complementing the complex score and thereby enhancing the accuracy of DT measurements in patients with schizophrenia. 20 Furthermore, the results of this study revealed that corroboration of both evaluation items is necessary to predict life skills. This highlights the value of the m‐TTT total score, which can measure both functions collaboratively.…”

“… 13 Comparisons have been drawn between the TTT scores of neurotypical individuals and those associated with conditions such as brain injury, 14 , 15 , 16 Alzheimer's disease, 17 , 18 poststroke syndrome, 19 and schizophrenia. 20 Furthermore, the potential of the TTT scores to forecast employability and aptitude to engage in social tasks was explored. 21 However, traditional TTT scoring, which focuses on a test's end product, does not capture the full extent of DT.…”

“…Subsequently, we gauged the reliability and validity of the m‐TTT as a test for DT in patients with schizophrenia. 20 …”

“…Our previous research indicated that patients with schizophrenia scored lower on the m‐TTT compared to their neurotypical counterparts. 20 In this study, we thoroughly investigated the relationship between DT and life skills in patients with schizophrenia. By clarifying the predictive value of DT on life skills, this research can pinpoint potential areas of intervention for individuals with schizophrenia.…”