The best experiments are those in which:
A) all variables are allowed to act freely
B) all variables are held constant except the ones manipulated
C) all factors provide the desired results
D) the subjects are unpaid volunteers
E) two variables are held constant while all of the others are manipulated

Question

Quizplus · Accepted Answer

An experiment is characterized by the researcher changing one or more variables while observing the effects of those changes on another variable.

The Best Experiments Are Those in Which