Hou, Weng KaWeng KaHou2025-07-082025-07-082025-05https://dspace.usj.edu.mo/handle/123456789/6443This study amid rising academic pressures and youth mental health concerns, this study investigates how extracurricular activities (PECA) shape academic and psychological outcomes in Macau—a high-stakes educational context. Focusing on 6–18-year-olds, it examines two dimensions: activity type (sports, academic, cultural and artistic) and number of activities, addressing gaps in age-specific and cross- informant analyses within East Asian settings. Using the Achenbach System (ASEBA) in Macau, data from parents and adolescents were analyzed via ANOVA and independent t-tests. ANOVA revealed optimal academic performance (F[3, 456] = 12.34, p < 0.001) and fewer behavioral issues in students with 3 PECA. T-tests showed sports reduced adolescent self- reported depression (t[210] = -3.21, p = 0.002), while academic activities boosted parent-reported grades (t[198] = 4.57, p < 0.001). Cultural activities had limited mental health impacts but enhanced language/math skills. This study underscores the importance of extracurricular activities (PECA) in Macau’s unique cultural and academic context, by validating the ""optimal balance"" hypothesis, it suggests that participating in three well-chosen activities—spanning sports, arts, and academics—yields the best outcomes. The findings emphasize the need for culturally sensitive and developmentally appropriate PECA programs tailored to Macau’s students. This research provides valuable insights into optimizing PECA types and quantities, fostering academic success, emotional resilience, and personal growth, while supporting the holistic development of well-rounded young citizens.enextracurricular activitiesmental healthacademic achievementtext::thesis::master thesis