Cannabis use and vulnerability for psychosis in early adolescence--a TRAILS study.

Aims: To examine the direction of the longitudinal association between vulnerability for psychosis and cannabis use throughout adolescence.

Design: Cross-lagged path analysis was used to identify the temporal order of vulnerability for psychosis and cannabis use, while controlling for gender, family psychopathology, alcohol use and tobacco use.

Setting: A large prospective population study of Dutch adolescents [the TRacking Adolescents' Individual Lives Survey (TRAILS) study].

Motivational and cognitive inhibitory control in recreational cannabis users.

Substance use disorders have been associated with impaired decision making and increased impulsive behavior. Lack of inhibitory control may underlie such higher order cognitive difficulties and behavior problems. This study examined inhibitory control in 53 recreational cannabis users and 48 controls.

Social skills as precursors of cannabis use in young adolescents: a TRAILS study.

Social skills (cooperation, assertion, and self-control) were assessed by teachers for a longitudinal cohort of (pre)adolescents, with measurements at average ages 11.1 (baseline) and 16.3 years (follow-up).

Cannabis use and development of externalizing and internalizing behaviour problems in early adolescence: A TRAILS study.

Aim: To examine the prospective relationship between externalizing and internalizing problems and cannabis use in early adolescence.

Materials And Methods: Data were used from the TRAILS study, a longitudinal cohort study of (pre)adolescents (n=1,449), with measurements at age 11.1 (T1), age 13.