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

Question

Quizplus · Accepted Answer

When the effect of an intervention in a single-case design is in the same direction as a baseline trend, it is difficult to determine the precise effect of the intervention. The baseline trend may be responsible for the observed changes, and the treatment may not have had any effect at all. Therefore, the researcher cannot make firm conclusions about the effectiveness of the treatment.

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