Abstract Introduction Casual sexual relationships can be a way to achieve sexual pleasure without the need to establish bonds or succumb to pressures typical of a romantic relationship. However, despite the erotic satisfaction obtained, Casual Sex (CS) is associated with sexual risks such as sexually transmitted infections, abuse, harassment, unwanted pregnancy, and regret. In this regard, the scientific literature explicates that Social Skills (SS) are associated with promoting sexual health and preventing problems such as those aforementioned. Thus, the acquisition of SS can function as protection in CS contexts, contributing to self-protection and better performance. Consequently, in a previous study, the Sociosexual Skills Inventory (SSSI) was developed, a psychological assessment instrument that identifies SS in the context of seeking CS. The instrument has two factors that reveal direct and indirect approaches. Objective To confirm the internal structure and seek new validity indicators for the SSSI. Methods 374 young adults aged 18 to 29 (M = 23.37 and SD = 2.79) participated. The SSSI, the Love Styles Inventory (LSI), and the Condom Use Self-Efficacy Scale (CUSES) were administered. Confirmatory Factor Analysis (CFA) was conducted using JASP 0.16.2 software, and correlation analyses between the instruments were performed. All participants signed the Informed Consent Form, and the project was approved by the Research Ethics Committee. Results Two different models were tested through CFA, one with 18 items (as per the original instrument) (χ2: 269.204; df: 134; χ2/df: 2.01; TFI: 0.966; TLI: 0.961; RMSEA: 0.052) and the other with the suppression of items 8 and 10 (factor loadings of 0.34 and 0.17 respectively), with 16 items (χ2: 194.567; df: 103; χ2/df: 1.89; TFI: 0.976; TLI: 0.971; RMSEA: 0.049). The second was considered more suitable for excluding two items with loadings below 0.40, presenting better fit indices, and being theoretically more coherent. The final 16-item model maintained the two-factor structure: 1) Direct Sociosexual Skills (DSSS) (α = 0.81; ω = 0.82) and 2) Indirect Sociosexual Skills (ISSS) (α = 0.78; ω = 0.79). Regarding Pearson Correlation analysis, DSSS correlated with the Skill (0.18) and Assertiveness (0.20) dimensions of CUSES and with the Direct (0.65) and Subtle (0.53) styles of LSI; whereas ISSS correlated with Skill (0.15), STI (-0.12), and Assertiveness (0.23) dimensions of CUSES and Direct (0.52) and Subtle (0.65) Love Styles. Conclusions It was possible to verify that the SSSI remains with the internal factorial structure almost unchanged and with more validity indicators. Thus, it is noted that the instrument can be used by psychologists and researchers to evaluate the repertoire of SS for approaches in favor of CS, as well as possible behavioral problems that may contribute to sexual risks and the approach style employed in these contexts. Disclosure No.
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