A Preliminary Study of Psychometric Properties of the Persian Version of the Expanded Version of the Inferential Confusion Questionnaire (Icq-Ev) in A Non-Clinical Sample

Inferential confusion is defined as a failure to recognize the unrealistic nature of obsessions due to a subjective form of reasoning and seems to be particularly relevant to Obsessive-Compulsive Disorder (OCD). The present research question was to determine psychometric properties of the Persian version of the expanded version of the Inferential Confusion Questionnaire (ICQ-EV). the purpose of this study was to investigate the preliminary validity and reliability of the Persian version of ICQ-EV in a non-clinical sample. Correlation research design applied in this study, and data analyzed using Pearson correlation. The sample consisted of 207 students from Shahed University who were selected by random cluster sampling method. The Padua Inventory- Washington State University Revision (PI-WSUR) and Mood and Anxiety Symptoms Questionnaire (MASQ-D30) were used to examine the convergent validity. The Obsessive Belief Questionnaire (OBQ-44) and Thought-Action Fusion Scale (TAF) were used for Divergent validity. The reliability of the questionnaire was calculated using the Cronbach's alpha coefficient and the test-retest reliability within two weeks (p<0.01), which indicates the desirable reliability of the questionnaire. The significant relationship between ICQ-EV and obsessive-compulsive symptoms (p<0.01) supported the convergent validity of this questionnaire.  The significance of this relationship (p<0.01) after controlling cognitive variables indicated the divergent validity of this questionnaire.