Psychometric Properties of the ASA-27 in Emerging Adults: Toward a Shortened, Culturally Adapted Measure

Emerging adulthood is characterized by transitions toward independence, where separation anxiety may intensify. Despite its robust psychometric properties, previously investigated on adult samples, the Adult Separation Anxiety Questionnaire (ASA-27) lacks formal validation for emerging adults. This study aimed to investigate the psychometric properties of the ASA-27 on a sample of Italian emerging adults. 863 participants completed the ASA-27 and measures of anxiety and depression. With the aim of prospecting a shorter, optimized version of the tool, psychometric properties were assessed using the Classical Test Theory and Item Response Theory (IRT) approach. Convergent validity and measurement invariance across sex were also tested. The reduced 19-items version retained a unidimensional structure, strong internal consistency and convergent validity. Measurement invariance supported consistent use across sexes. The ASA-19 is a reliable and more user-friendly tool for assessing separation anxiety in emerging adults, contributing to improved psychological assessment and intervention strategies in this life stage.