In an experiment testing the effects of alcohol on performan

In an experiment testing the effects of alcohol on performance, Group A receives 3 nonalcoholic beers, Group B receives 6 nonalcoholic beers, Group C receives 3 alcoholic beers, and Group D receives 6 alcoholic beers.

The independent variable(s) in this experiment is/are

a. amount of alcohol

b. number of drinks

c. both a and b

d. none of the above

Solution

c. both a and b

amount of alcohol and number of drinks both are independent variables