Investigating the Psychometric Properties of the Acceptance of Modern Myths about Sexual Aggression (AMMSA) Scale in Iran

Sexual aggression and rape is one of the most challenging concepts in the current era; so the aim of this study was to investigate the psychometric properties of The Acceptance of Modern Myths about Sexual Aggression (AMMSA) Scale in the Iranian population. For this purpose, factor structure, validity and reliability of the scale was examined.

Methods and Materials: 

A sample group of 937 Iranian people living in Iran who were between 20 and 50 years old, were selected by convenience sampling method; Then they completed the scale of The Acceptance of Modern Myths about Sexual Aggression. Confirmatory factor analysis was used to investigate the factor structure of the scale, Pearson correlation coefficient was used to evaluate the validity, and Cronbach's alpha method was used to determine the internal consistency of the components of this scale. Intra-class correlation coefficient was also used to evaluate the reliability of the retest.

Confirmatory factor analysis showed that the AMMSA scale has an acceptable factor structure. Cronbach's alpha coefficients obtained from all components (above 0.9) also showed that this scale has a good internal consistency and also the correlation coefficients of Ambivalent Sexism Inventory (ASI) and Interpersonal Reactivity Index (IRI) confirmed divergent and convergent validity of the scale, respectively (P<0.001).

The results showed that The Acceptance of Modern Myths about Sexual Aggression (AMMSA) Scale has appropriate validity and reliability in Iranian population.