Validation and Psychometric Properties of Self-Confidence Questionnaire (PEI)

Self-confidence is an individual characteristic in students that enables them to have a positive or realistic view of themselves. The purpose of present study was to evaluate the validity and psychometric properties of the Self-confidence Questionnaire (PEI)

This cross-sectional study was conducted on 100 students of four medical universities. Validation of this questionnaire included the steps of translation, content validity, face validity, repeatability and internal consistency.

The mean age of the participants in this study was 32.1 (SD = 5.5) years. The majority of the students were postgraduate students (47%) and the least (11%) were undergraduate students. The results of this study showed that the overall relevancy and clarity of the questions were 92% and 83%, respectively. The percentage of agreement on overall comprehensiveness was 100%. Cronbachchr('39')s alpha coefficient and interclass correlation coefficient were higher than 0.7 in all domains. The ICC of each question was also between 0.72 and 0.98.

Based on the results of this study, the Persian version of the PEI questionnaire has an appropriate reliability for use in the student population of Iranian universities.