Essay about Different Types Of Research Design

731 Words Aug 12th, 2015 3 Pages
Doing research in social work means looking for a logical causal inference in which the independent variable has had an impact on the dependent variable. How we look for a causal inference depends on the research design we choose to use, which is dependent on what kind of research is being done. There are many different kinds of research design, but for this discussion we look at the differences between one group pretest-posttest design, classic experimental design, and non-equivalent comparison group design, focusing on their strengths, threats and protections to internal validity, and their similarities and differences in which the template helped as a visual to compare all of these characteristics for each design study. Through Rubin (2014) and a template given to the class by the professor, the breakdown of the three research designs are as follows:
One Group Pre-test/Post-test Design- The main advantage to having one group is that variability between individuals ' results in the treatment and control group is eliminated, as the pre- and post-test measurements are made within the same individual. The downside to this is the fact that no one will take a research study solely based on one group. This is more of a pre-test/post-test for the major study to come. Another disadvantage is it does not account for factors other than the IV might have caused the change to DV between pre and post test, little internal validity, lack of pre-experimental selection…

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