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

Multiple Choice

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