Which threat to internal validity is controlled by the multiple time series design but not by the other time series designs
A)statistical regression
B)maturation
C)multiple testing effects
D)history

Question

Quizplus · Accepted Answer

The multiple time series design controls for the threat of history by comparing the effects of a variable over time in a treatment group with the effects observed in a control group that did not receive the treatment. This comparison helps to isolate the impact of external historical events that might otherwise confound the results.

Which Threat to Internal Validity Is Controlled by the Multiple