If an experiment has two groups of participants and if both groups are "chronic schizophrenics," then chronic schizophrenia is most likely a(n)
A) independent variable
B) dependent variable
C) controlled extraneous variable
D) any of the other alternatives are likely.

Question

Quizplus · Accepted Answer

Since both groups of participants are "chronic schizophrenics," chronic schizophrenia is not being manipulated or measured as an outcome but is instead a characteristic that is constant across groups, making it a controlled extraneous variable.

If an Experiment Has Two Groups of Participants and If