Objective: To validate the Chinese version of the nine-item Internet Gaming Disorder Scales-Short Form (IGDS-SF9), Bergen Social Media Addiction Scale (BSMAS), and Smartphone Application-Based Addiction Scale (SABAS) among Hong Kong university students. Participants and Methods: Participants aged between 17 and 30 years participated in the present study (n=307; 32.4% males; mean [SD] age=21.64 [8.11]). All the participants completed the IGDS-SF9, BSMAS, SABAS, and the Hospital Anxiety and Depression Scale (HADS). Confirmatory factor analyses (CFAs) were used to examine the factorial structures and the unidimensionality for IGDS-SF9, BSMAS, and SABAS. Results: CFAs demonstrated that the three scales were all unidimensional with satisfactory fit indices: comparative fit index = 0.969 to 0.992. In addition, the IGDS-SF9 and BSMAS were slightly modified based on the modification index in CFA. Conclusions: The Chinese IGDS-SF9, BSMAS, and SABAS are valid instruments to assess the addiction levels of internet-related activities for Hong Kong university students.

Adolescentdevelopmental assets; Psychosocial health; Weight status Backgrounds: Asset-based youth development has been proposed to be associated with health behaviors and psychological well-being in adolescents. This study aims to extend the current knowledge regarding the effects of positive youth development on weight status and psychosocial health outcomes in young adulthood using a large representative longitudinal sample. Methods: Data were retrieved from the Taiwan Youth Project that comprised a longitudinal cohort of adolescents (N Z 2688) surveyed at grades 7, 8, 9, and 12, and at age 22. Principal component analysis was used to construct developmental asset scores based on 35 items selected from the relevant questions at wave 1. Outcomes were standardized scores of body mass index, self-rated healthiness and happiness, depressive symptomology and deviant behaviors in the subsequent waves. Generalized estimating equation analysis was applied to