When the Effect of an Intervention in a Single-Case Design

Multiple Choice

When the effect of an intervention in a single-case design is in the same direction as a baseline trend (either increasing or decreasing) ,the researcher

A) cannot make firm conclusions about the effectiveness of the treatment.
B) can be confident that the treatment did not work because of the baseline trend.
C) can be extra confident regarding the effectiveness of the treatment.
D) none of these