Background and aims: Sex addiction is characterized by excessive sexual activity on the Internet. We have investigated the contribution of the Big Five personality factors and sex differences to sex addiction.
Methods: A total of 267 participants (186 males and 81 females) were recruited from Internet sites that are used for finding sexual partners. Participants' mean age was 31 years (SD = 9.8). They filled in the Sexual Addiction Screening Test (SAST), the Big Five Index, and a demographic questionnaire.
Results: Men have shown higher scores of sex addiction than women (Cohen's d = 0.40), they were more open to experiences (Cohen's d = 0.42), and they were less neurotic than women (Cohen's d = 0.67). Personality factors contributed significantly to the variance of sex addiction [F(5, 261) = 6.91, p < .001, R2 = .11]. Openness to experience (β = 0.18) and neuroticism (β = 0.15) had positive correlations with SAST scores, whereas conscientiousness (β = -0.21) had a negative correlation with SAST scores, and personality traits explained 11.7% of the variance. A parallel moderation model of the effect of gender and personality traits on sex addiction explained 19.6% of the variance and it has indicated that conscientiousness had a negative correlation with SAST scores. Greater neuroticism was associated with higher scores of SAST in men but not in women.
Discussion and conclusions: This study confirmed higher scores of sex addiction among males compared to females. Personality factors together with gender contributed to 19.6% of the variance of ratings of sex addiction. Among men, neuroticism was associated with greater propensity for sex addiction.
Keywords: Big Five Index; compulsive sexual behavior; personality; sex addiction; sex differences.