Assume that your instructor wants to evaluate the effects of the intensity of surrounding light (in watts)on performance in a Nintendo game.Individuals who vary randomly in their initial skill level on the game are assigned to a room containing an overhead light at a selected intensity.Each participant plays the game in their assigned room at the same time of day,and their high score is measured.A control variable in this study is ____.
A) level of light (in watts)
B) Nintendo game score
C) time of day
D) skill level

Question

Quizplus · Accepted Answer

The control variable is the factor that is kept constant to test the effect of the independent variable, which in this case is the intensity of surrounding light. The time of day is controlled across all participants to ensure that it does not influence the outcome, making it the control variable.

Assume That Your Instructor Wants to Evaluate the Effects of the Intensity