Furthermore, there is no evidence to support a causal relationship between cannabis use and those behavioural characteristics, which have been described as an amotivational syndrome. "Amotivational syndrome" is a scientific term for laziness. Studies have shown an association between heavy cannabis use in adolescence and the risk of leaving school early and experiencing job instability in young adulthood. However, the strength of these associations is reduced in longitudinal studies when the low educational aspirations and poorer school performance of heavy cannabis users before their cannabis use is taken into account. On balance the evidence available suggests that daily or near daily cannabis use does not improve the educational performance of those who were performing poorly already.
