In an experiment, control over extraneous variables, such as the time of day or the temperature of the room, can be obtained by
A)using a double-blind experiment.
B)making all conditions except the independent variable exactly the same for all subjects.
C)using repeated measures.
D)observing and recording the impact of each variable on each subject in the experiment.

Question

Quizplus · Accepted Answer

Making all conditions except the independent variable exactly the same for all subjects ensures that any observed effects can be attributed to the independent variable rather than to extraneous variables. This method controls for potential confounding variables by keeping the experimental conditions consistent across participants, except for the manipulation of the independent variable.

In an Experiment, Control Over Extraneous Variables, Such as the Time