Generally known as the idiographic approach, it emphasizes the uniqueness of each individual. Using case studies of a specific person is how a scientist would study psychodynamic behavior (hypotheses). Each perspective has its strengths and weaknesses. It's good to have to do a case study, it allows you to build a relationship and the client will be more open and generous towards the assessment. A weakness would be that, since the case studies are individual, it is not possible to generalize with other.