Psychometric Properties of the Persian Version of Volitional Questionnaire in Patients with Severe Mental Illnesses

Background: the volitional questionnaire is an observational tool to assessmotivation, which is based on the moho model and completed by an assessorbased on the individuals’ observation when performing an occupation or activity.the present study aims to translate and evaluate the validity and reliability ofthis instrument in individuals with severe mental illnesses and to provide anappropriate tool for volitional assessment.methods: in this study, the volitional questionnaire was translated into persianaccording to the iqola protocol. to assess the content validity, an expert panelwas held with six experts. the face validity of the test was measured throughcompleting a questionnaire by ten occupational therapists. to investigatethe inter-rater reliability of the test, two testers completed the questionnairefor 30 individuals. the internal consistency of the instrument was calculatedby performing the cronbach’s alpha coefficient, through completing thequestionnaire for 98 individuals.results: the participants in the expert panel stated that concept of motivation isproperly reviewed by the items of questionnaire. all the questionnaire items hada significant important score of 0.7, indicating the suitability of its face validity.inter-rater reliability (icc = 0.93) was ideal, and the internal consistency of thequestionnaire (cronbach’s α = 0.86) was appropriate.conclusion: the questionnaire has desirable validity and reliability and canbe used by specialists as a suitable tool for clinical evaluation and therapeuticplanning of individuals with severe mental illnesses.