The interrupted time series design involves:
A)making an observation immediately before and immediately after a treatment is instituted.
B)using time as the independent variable.
C)making observations over an extended period of time before and after a treatment is instituted.
D)comparing treatment and control groups over an extended period of time.

Question

Quizplus · Accepted Answer

The interrupted time series design involves making observations over an extended period of time before and after a treatment is instituted. This allows researchers to examine any changes in the outcome variable that may be associated with the intervention. Time is used as a variable in this design, but it is not the independent variable. Treatment and control groups may or may not be used in this design, so option D is not accurate. Option A describes a pre-post test design and is not specific to interrupted time series.

The Interrupted Time Series Design Involves