The non-users in this experiment could not have ever smoked marijuana before, while the users had a history of smoking marijuana at least four days and six months. The participants responded to a television, and radio advertisement (Donald M. Dougherty, etc). While conducting the experiment, participants were asked to give a breath and urine samples for alcohol and drug screening. Participants had to complete a Barratt Impulsiveness Scale (BSI), along with a 47-item marijuana craving questionnaire, and a strongly agree or disagree questionnaire, so that researchers could asses participants thoughts and feelings about marijuana use. All these methods were used to find the relationship between marijuana users and the psychological effect on the …show more content…
Dougherty, etc). Heavy Marijuana users had impairments with the short term memory area in the brain (hippocampus, and subiculum); “even when the participants had abstained from smoking after six weeks” (Donald M. Dougherty, Etc). “Recall memory was poor in marijuana adults and adolescents, but evidence shows that recall deficits can recover with extended abstinence in moderately heavy using adolescents” (Donald M. Dougherty,