Strong evidence of a treatment effect in a time series with nonequivalent control group design is indicated by
A) discontinuity in the comparison group but not in the treatment group.
B) discontinuity in the treatment group but not in the comparison group.
C) discontinuity in both the treatment group and the comparison group.
D) discontinuity in neither the treatment group nor the comparison group.

Question

Quizplus · Accepted Answer

Discontinuity in the treatment group but not in the comparison group indicates a strong treatment effect. This is because the treatment group was exposed to the treatment, which caused a discontinuity or change in the time series data. However, the comparison group did not receive the treatment and did not experience a discontinuity, indicating that the treatment is likely responsible for the observed changes in the treatment group. Discontinuity in both groups could indicate other confounding factors contributing to the observed changes in the time series, and no discontinuity in either group would indicate no treatment effect.

Strong Evidence of a Treatment Effect in a Time Series