ABSTRACT
Second, and unique to the quasi experiment, the researcher selects the groups to be compared so that they are as similar as possible in all respects except that one group has the program and the other group does not, or has a different program. This means that the quasi experiment compares ongoing programs that have not been assigned by the researcher. Instead, the programs have been politically or administratively assigned or chosen by a process in which she is usually a passive observer. She carefully selects for study among the ongoing programs so that the units of analysis are as comparable as possible, except that one unit has the program (or it has program A) and other units do not (or they have program B). In the quasi experiment, often only a subset of relevant units of analysis are selected for study.
