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 the ____.
A) level of light (in watts)
B) Nintendo game score
C) time of day
D) skill level

Question

Quizplus · Accepted Answer

The time of day is a control variable in this study because it is kept constant for all participants to ensure that variations in performance are not due to differences in the time of day the game is played, which could affect factors like alertness and concentration.

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