Psychometric Properties of Jackson's Five Factor Questionnaire: Scales of revised Reinforcement Sensitivity Theory (r-RST)

The aim of the present study was to develop a Persian version of Jackson’s five factor questionnaire and to assess its reliability and validity in the Iranian society.Following the preparation of the Persian version of Jackson’s five factor questionnaire through using double translation technique, it was administrated on 308 subjects (174 males and 134 females). The reliability of questionnaire was assessed via internal consistency, item-rest correlations and test-retest methods. In addition, the validity of the scale was investigated using factor analysis, correlations between subscales and criterion validity methods. Cronbach’s alphas range (0.72 to 0.88), test-retest coefficients (0.64 to 0.78)) and test-retest correlations (0.28 to 0.68) suggested good reliability of the Persian version of Jackson’s five factor questionnaire. Confirmatory and explanatory factor analysis supported the original five factor model of questionnaire. The internal relations between the subscales were appropriate (0.11 to 0.53). Finally, existence of special correlation patterns between subscales of the questionnaire and positive affect, negative affect, behavior inhibition / activation systems scale, Eysenck’s personality dimensions and Barrett’s impulsivity dimensions indicated good validity of the scale.The results of this research showed that the Persian version of Jackson’s five factor questionnaire had suitable factor structure, reliability and validity in the Iranian society.