A quasi-experimental design is one that has some similarity to an experimental design but does not consist of the main element at random. The captivating aspect of these design is that in when formed as a group, they are easily applied than when they are randomized. However, there is a single case experiment whereby the results of the independent variable is gauged using information derived from a single partner. In a single case design, there are the standards of behavior observed before the introduction of the experiment. The common type of a single case and quasi experimental design is called reversal or withdrawal design. This type delivered its name due to the way it tend to repeat its introduction as a result of the second baseline stage which involves the behavior control procedure (Sherri, 2011).
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The reversal design comprises of two participants or groups which follows a given procedure. The parties are only two whereby one who is introduced to the first step and repeated before the end of the first phase. The steps are; baseline whereby one of the participant acts as a controller of behavior then there is the manipulation of the reversal design which involves the other participant. Later the first participant behavior is measured to see if there are any changes caused by the manipulation of the design which continues constantly until the end of the experiment. This is referred to as multiple baseline design due to the repetition observation of behavior before and after the introduction of the design. The multiple baseline increases the reliability and internal validity of the outcomes. The sensitive issue of this design is the how to deliver the data to the target group .however, the researcher tends to collaborate in this and hence makes it easier for the valid data to spread all over (Louis & Lawrence, 2007). The quasi-experiments are not mostly carried out in laboratory, and since some variables like socioeconomics issues are not exposure to random test questions are taken from the target group and the researchers tend to reply to their needs (Sherri, 2011).