There are three basic types of research designs including: (1) experimental designs; (2) quasi-experimental designs; and (3) non-experimental designs. (Shadish, Cook and Campbell, 2002) the 'gold standard' is stated to be represented by "...experimental evaluations that make use of the random assignment of individuals to interventions and control groups..." (Mulhlhausen, 2009)
Mulhlhausen (2009) reports that randomized evaluations are of the nature that serve to "ensure that pre-progam differences between the intervention and control groups do not confound or obscure the true impact of the programs being evaluated." In addition, random assignment is stated to enable the evaluator in testing "for differences between the experimental and control groups that are due to the intervention and not to pre-intervention discrepancies between the groups. By drawing members of the interaction and comparison groups from the same source of eligible participants, these experimental evaluations are superior to other evaluations using weaker designs." (Mulhlhausen, 2009)
IV. Limitations of Current Program Assessment
Noted as limitations of current program assessment in prison are factors such as: (1) overstating of program effectiveness (Weisburd, Lum and Petrosino (2001); and (2) too little evaluation (James, 2009). Weisburd holds that there is "...a moral imperative upon researchers to conduct randomized experiments. The moral...
minds of the researchers. It is hoped that these studies also provide information that assists in addressing issues that need to be addressed. In this particular case a study is proposed to assist the researcher(s) in understanding exactly how prevalent drug use is amongst parolees and, perhaps more importantly, why is it so prevalent. It is hoped that by understanding the extent of the problem, as well as the
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