Researchers seek people for effects of cannabis on cognition study

If you have smoked five joints a week, every week, for the past year, then science needs you. 
A research collaboration between Alberta Health Services, the University of Alberta and MacEwan University is studying 120 healthy Edmontonians aged between 18 and 35 to understand the short and long-term effects of cannabis use and its residual effects on cognition, motor skills and sensory skills.
It will also look at how people with mental illness are affected by cannabis. 
Principal inves