A limitation of the interrupted time-series design is that changes in the dependent variable may be due not to the intervention,but to:

Question

Quizplus · Accepted Answer

Interrupted time-series designs are vulnerable to confounding external events and other disruptions that may affect the dependent variable. "Seasonal" changes in the dependent variable can also occur, making it more challenging to interpret the results of the intervention. Therefore, both options A and B are correct. Random assignment to a control group is not possible with this design, but this is not a limitation in and of itself.

A Limitation of the Interrupted Time-Series Design Is That Changes