A longitudinal study of the effects of cannabis exposure on neuro-development in adolescents and young adults

You are invited to participate in a research study designed to look at brain signals, eye blinking responses, muscle and eye movements, and epigenetic markers and clinical measures associated with thinking, perception, mood, memory, and attention during brain development. You have been asked to participate because you are medically healthy, you do not suffer from mental illness, or you have or have not used marijuana. Your participation will be spread out over one screening session (approximately 3 hours), and three 3-hour test sessions (over a 18 month period). The number of sessions you will complete will be discussed with you in advance. If you are in the adolescent age group (13-18 years) your parents will be contacted to obtain a consent to participate in the study in addition to obtaining an assent from you.