In this essay, I will do a journal article comparison. The articles selected have something in common – treatment of drug. The first article is “Do drug treatment variables predict cognitive performance in multidrug-treated opioid-dependent patients? A regression analysis study” by Pekka Rapeli, Carola Fabritius, Hely Kalska and Hannu Alho. This article was taken from an open access article under Substance Abuse Treatment, Prevention, and Policy 2012, at http://www.substanceabusepolicy.com/content/7/1/45. The second article entitled “Treating Drug Abuse and Addiction in the Criminal Justice System: Improving Public Health and Safety” by Redonna K. Chandler, Bennett W. Fletcher and Nora D. Volkow. It was taken from a public access journal under National Institute of Health: JAMA. 2009 January 14; 301(2): 183–190. doi:10.1001/jama.2008.976.

The purpose of the first article was to examine the predictive power of drug treatment variables on specific cognitive performance measures in multidrug-treated opioid dependent patients. Also, the researchers interested in finding out which of the possible significant associations turn out as hypothesized. On the other hand, the purpose of the second article was to summarize relevant neuroscientific findings and evidence-based principles of addiction treatment that, if implemented in the criminal justice system, could help improve public health and reduce criminal behaviour.

For methodologies, the first research involved 104 Opioid-Dependent Patients who were treated either with buprenorphine (52 patients) or methadone (52 patients) were given attention, working memory, verbal, and visual memory tests after they had been a minimum of six months in treatment. Group-wise results were analysed by analysis of variance. Predictors of cognitive performance were examined by hierarchical regression analysis. Among the instruments