This study aims to determine the structural equation modeling of sexual function based onalexithymia and behavioral avoidance/ activation systems and personality traits in women. Sample population was all married women living in Esfahan which 226 of them were selected by convenience sampling method and responded to NEO Five-Factor Inventory (McCrae & Costa ،1989), the Arizona’ sexual experience questionnaire (1993), Toronto Alexithymia Scale (Bagby, Parker& Taylor ,1986), behavioral avoidance/activation system scale (carver& white,1994). Data was done by using Pearson correlation and confirmatory factor analysis. The result showed that there was a significant negative relationship between alexithymia, behavioral avoidance with sexual function(P<0.001). There was a significant positive relationship between behavioral activation with sexual function(P<0.001).Neuroticism due to behavioral inhibition, alexithymia had a negative impact on sexual function (P<0.001). Extroversion and agreeableness due to behavioral activation had a positive impact on sexual function(P<0.001).Conceptual model of sexual function based on alexithymia, behavioral avoidance/ activation systems and personality traits was fit(CFI=0.97).
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