Time series designs are pretest-posttest designs that ______.
A) include a randomly assigned control group
B) compare a pattern of scores over time before and after the treatment
C) include groups that do not take the pretest
D) include groups that do not take the posttest

Question

Quizplus · Accepted Answer

Time series designs involve measuring a pattern of scores over time, both before and after a treatment or intervention is introduced. This is different from a pretest-posttest design, which typically only measures scores before and after the treatment. Time series designs do not necessarily include a control group or groups that do not take either the pretest or posttest.

Time Series Designs Are Pretest-Posttest Designs That ______