The (hetero)sexual double standard (SDS), prescribing sexual modesty for girls and sexual prowess for boys, negatively affects sexual and mental health. Nevertheless, endorsement and enactment of the SDS is still common. In this study, we respond to recent calls for modernization in the field of sexual double standard research. We describe the development of the "Scale for the Assessment of Sexual Standards among Youth" (SASSY), as well as its psychometric properties. This instrument was designed to measure contemporary sexual double standard endorsement, defined as "the degree to which an individual's attitude reflects a divergent set of expectations for boys and girls, in that boys are expected to be relatively more sexually active, assertive, and knowledgeable and girls are expected to be relatively more sexually reserved, passive, and inexperienced" among adolescents and emerging adults. In Study 1, a pool of 35 items was administered in a Dutch sample (N = 465, 54.8% female, age 16-20). A 20-item set formed a one-dimensional and internally consistent scale and was subsequently administered in a second Dutch sample. Study 2 (N = 818, 58.4% female, age 16-25) again assessed the 20-item set. After dropping one item, the 19-item SASSY proved to be one-dimensional and internally consistent, exhibiting good test-retest reliability, construct validity, and convergent validity. Finally, the instrument showed configural and metric measurement invariance across gender, age, education level, and sexual experience level, and configural, metric, and scalar measurement invariance across time. These studies confirmed the 19-item SASSY to be a reliable and valid new tool for the assessment of contemporary sexual double standard endorsement among adolescents and emerging adults.
Keywords: Adolescents; Sex role attitudes; Sexual double standards; Sexuality; Social norms.