The Difference Between a Case Study and a Single-Subject Experiment

Multiple Choice

The difference between a case study and a single-subject experiment is that

A) the former focuses on many subjects whereas the later focuses on a single individual.
B) the latter focuses on a series of behaviors whereas the former focuses on just a single behavior.
C) the former focus on the environment whereas the latter focus on the individual.
D) there is no basic difference between the two.