If X = experimental treatment and O = pretest or posttest observation, then "O O O O X O O O" represents the _____ design.
A) delayed posttest control group
B) interrupted time series
C) repeated treatment
D) regression discontinuity

Question

Quizplus · Accepted Answer

This design represents an interrupted time series, where multiple pretest and posttest observations are collected but the treatment is introduced at one point in time, creating a discontinuity in the time series data.

If X = Experimental Treatment and O = Pretest or Posttest