One good way to avoid the internal-validity threats that might result from withholding the experimental treatment from the control group is to
A) give the experimental treatment to a subsample of the control group chosen by public lottery.
B) identify volunteers who do not object to being in a no-treatment control group.
C) give the experimental treatment to the control group after the experiment is concluded.
D) work with the control group until all necessary data have been collected, and then begin working with the experimental group.

Question

Quizplus · Accepted Answer

Giving the experimental treatment to the control group after the experiment has concluded allows for the collection of data on the effects of the treatment while also addressing ethical concerns about withholding potentially beneficial treatments from participants. This approach does not compromise the internal validity of the experiment, as the control group receives the treatment only after the necessary data have been collected.

One Good Way to Avoid the Internal-Validity Threats That Might