title: Symptoms of schizotypy precede cannabis use.
abstract: The current investigation uses a large non-clinical sample of undergraduate college students (N=189) to investigate schizotypal traits among cannabis and non-cannabis users, as well as the temporal order of the onset of these traits and cannabis use. Findings suggest that regular cannabis users are significantly more prone to cognitive and perceptual distortions as well as disorganization, but not interpersonal deficits, than non-regular users and those who have never used. Additionally, the onset of schizotypal symptoms generally precedes the onset of cannabis use. The findings do not support a causal link between cannabis use and schizotypal traits.
authors.affiliation: Department of Psychology, University of Hawaii at Manoa, 2430 Campus Road, 110 Gartley Hall, Honolulu, HI 96822, USA. schiffma@hawaii.edu
authors.forename: Jason
authors.initials: J
authors.lastname: Schiffman
authors.forename: Brad
authors.initials: B
authors.lastname: Nakamura
authors.forename: Mitchell
authors.initials: M
authors.lastname: Earleywine
authors.forename: Joseph
authors.initials: J
authors.lastname: LaBrie
mesh_terms: D000293:Adolescent; D000328:Adult; D002186:Cannabinoids / Q000009:adverse effects; D003072:Cognition Disorders / Q000139:chemically induced / Q000175:diagnosis / Q000523:psychology; D005260:Female; D006801:Humans; D007398:Interpersonal Relations; D008297:Male; D002189:Marijuana Abuse / Q000175:diagnosis / Q000523:psychology*; D010469:Perceptual Distortion; D010555:Personality Inventory / Q000706:statistics & numerical data; D010698:Phobic Disorders / Q000139:chemically induced / Q000175:diagnosis / Q000523:psychology; D011594:Psychometrics / Q000706:statistics & numerical data; D012016:Reference Values; D012569:Schizotypal Personality Disorder / Q000175:diagnosis / Q000523:psychology*; D012919:Social Behavior; D013334:Students / Q000523:psychology; D011795:Surveys and Questionnaires
chemical_list: D002186:Cannabinoids