Physical Variables When Heather ran all the subjects in condition A on Thursday and those in condition B on Friday, she confounded her experiment with a ____ variable.
A)context
B)personality
C)physical
D)social

Question

Quizplus · Accepted Answer

Physical variables refer to anything that could physically affect the experiment or its results, such as the day of the week the experiment was run or the equipment used. In this case, Heather confounded her experiment by running subjects in different conditions on different days, which introduces a physical variable that could potentially affect the results.

Physical Variables When Heather Ran All the Subjects in Condition