WP 2: Fieldwork and neuropsychological assessment: The investigators will validate and standardize computerized tests to reduce inter-observer variability during assessment and ensure that data are recorded automatically without errors. Moreover, self-reported and internationally validated psychometrical scales will be used to further assess adolescent socio-emotional behaviour. In this project, the investigators will exploit the interaction between neuropsychologists and epidemiologists to test a range of neuropsychological functions that cover the various complex behaviours that are under development during adolescence.