Posts Tagged ‘correlation’

This is a classic case of confusing correlation with causality.  While I have no doubt that the researchers found a correlation between cannabis use and depression, it is more likely that the depression was causal, rather than vice versa.  A student, struggling with school, due to low IQ or poor study habits, will often get depressed over it.  Some will self-medicate with intoxicants to help cope.  These researchers are trying to imply that the cannabis is causal, but that has not been established.