A researcher investigated the relationship between alcohol intake and reaction time in a driving simulation task. Participants d
rank either one ounce or three ounces of alcohol and were then measured on braking speed at a simulated red light. The independent variable was the:______. A- alcohol intake
B- braking speed
C- reaction time
D- driving simulation task
<u>The dependent variable in a study is the one being measured by that study. The independent variable is the factor researchers control or change in order to affect the dependent variable.</u> In the study described in the question, the researcher wished to measure the reaction time of participants. <u>The independent variable, the factor that was changed to influence the reaction time, was the alcohol intake.</u> Some participants drank one ounce, while others had three ounces of alcohol.
