Which of the following techniques is an accepted method of controlling for regression artifacts?
A) comparing observed posttest scores with a predicted posttest score
B) matching posttest scores in the treatment group to scores in a separate "control group," after assignment to treatments has been determined
C) comparing outcomes for participants in a treatment group to those from a control group using a score that reflects the pattern of responses on several covariates
D) A and B
E) A and C
F) all of the above

Question

Quizplus · Accepted Answer

Both techniques of comparing observed posttest scores with a predicted posttest score and comparing outcomes for participants in a treatment group to those from a control group using a score that reflects the pattern of responses on several covariates are accepted methods of controlling for regression artifacts. Matching posttest scores in the treatment group to scores in a separate "control group" after assignment to treatments has been determined is not a commonly accepted method of controlling for regression artifacts. Therefore, the correct choice is E.

Which of the Following Techniques Is an Accepted Method of Controlling