As with pretest-posttest designs, limitations of time series designs exist due to possible ______ factors that can affect a score pattern change other than the treatment or event of interest.
A) independent
B) dependent
C) extraneous
D) control

Question

Quizplus · Accepted Answer

Time series designs involve measuring the same variable(s) over multiple points in time. Therefore, any external factors that could affect the scores over time need to be controlled for, such as seasonal changes or changes in the overall economy. These extraneous factors could potentially create score pattern changes that are not related to the treatment or event of interest, leading to inaccurate conclusions about the effectiveness of the intervention.

As with Pretest-Posttest Designs, Limitations of Time Series Designs Exist