problem 1: Describe the term single-case designs and when are they most helpful?

problem 2: How might a researcher improve the generalizability of the results of the single case design? 

problem 3: Illustrate the relationship between the quasi-experiments and confounding variables? Give an instance.

problem 4: Give illustrations of: one-group posttest designs and one-group pretest and posttest designs. prepare down the limitations of each?

problem 5: Give illustrations of non-equivalent control group designs. What are the merits of having a control group?

problem 6: What do you mean by quasi-experimental research design? Why would a researcher use a quasi-experimental design instead of a true experimental design?