RT Conference Proceedings T1 The big five personality traits and extracurricular activities A1 Prieto-Latorre, Claudia A1 Marcenaro-Gutiérrez, Óscar David A1 López-Agudo, Luis Alejandro A1 Oliveira Henriques, Carla K1 Adolescentes - Psicología - Congresos AB This study analyses the potential of extracurricular activities in the development of personality traits in adolescence. The five broad personality traits described in this model are extraversion, agreeableness, openness, conscientiousness, and neuroticism. In particular, the aim is to define the profile of adolescents who attain a balance in the five domains, and allocate their time out-of-school optimally to the development of the big five. To do so, the methodological approach combines regression analysis based on data from eight different countries as well as interval multiobjective programing techniques. The results show that Internet use of more than one hour per day has a negative effect on the process of personality traits formation, especially on the dimension of conscientiousness and neuroticism. The performance of other activities is also discussed in the article. YR 2024 FD 2024 LK https://hdl.handle.net/10630/29270 UL https://hdl.handle.net/10630/29270 LA eng NO This work has been partly supported by Ministerio de Ciencia e Innovación (under Research Project PID2020-119471RB-I00); by the Andalusian Regional Government (SEJ-645), the Fundación Ramón Areces (under Research Project B1-2022_23) and Universidad de Málaga, Campus de Excelencia Internacional Andalucía Tech. DS RIUMA. Repositorio Institucional de la Universidad de Málaga RD 20 ene 2026