In using an interrupted time-series design, how does one determine whether the independent variable had an effect?
A) by looking for changes in the response pattern from pre- to post-treatment
B) by using the chi-square statistic
C) by comparing pre-treatment mean performance to post-treatment mean performance
D) by comparing the treatment group's data to a single observation of a control group

Question

Quizplus · Accepted Answer

In an interrupted time-series design, the effect of the independent variable is determined by examining changes in the pattern of the dependent variable over time, specifically looking for shifts or trends that occur after the introduction of the treatment or intervention.

In Using an Interrupted Time-Series Design, How Does One Determine