In a carefully controlled experiment, the only possible cause for any effect noted in the dependent variable is the
A)independent variable.
B)extraneous variable.
C)random assignment.
D)random selection.

Question

Quizplus · Accepted Answer

In a carefully controlled experiment, the independent variable is the one that is manipulated by the researcher to observe its effect on the dependent variable, making it the only possible cause for any effect noted.

In a Carefully Controlled Experiment, the Only Possible Cause for Any