Assessing alexithymia in adolescents: psychometric properties of the Perth Alexithymia Questionnaire in high school students

Conceptually, alexithymia is a key transdiagnostic risk factor for the development of numerous psychopathologies across the lifespan. However, to date, most alexithymia research has focused on adults, with adolescent work limited by a lack of validated age-appropriate assessment tools. Recently, the Perth Alexithymia Questionnaire (PAQ) was introduced to enhance the comprehensiveness of alexithymia assessments, but its psychometric properties have only been tested in adults. In this study, we address this by examining the psychometric properties of the PAQ in a sample of English-speaking high school students (N = 225, aged 11 to 18), and use the PAQ to further establish the structure of the alexithymia construct in adolescents. Confirmatory factor analysis revealed that all PAQ items conformed well to the expected factor structure, supporting that the PAQ was measuring a coherent multidimensional construct, consistent with the attention-appraisal model of alexithymia. All subscale and composite scores had good to excellent internal consistency (α_range =.83 to.95) and correlated in expected ways with other emotion measures. Together, these findings suggest that the multidimensional structure of the alexithymia construct manifests similarly in adolescents and adults, and that the PAQ is a valid and reliable measure of alexithymia in adolescents.