Repeated Delta 9-Tetrahydrocannabinol Exposure in Adolescent Monkeys: Persistent Effects Selective for Spatial Working Memory Verrico CD, Gu H, Peterson ML, Sampson AR, Lewis DA American Journal of Psychiatry 171:416-425, 2014 Acute exposure to cannabis produces impairments in working memory, the ability to briefly hold a small amount of information such as a phone number, in mind in order to guide thoughts or...