Audrey Examines Students' Learning of Science Principles from Interactive Games

Multiple Choice

Audrey examines students' learning of science principles from interactive games. She randomly assigns the fifth grade students in her study to a control condition with no play time, a timed play condition, or an unlimited time play condition. She also groups her students into either high or low ability groups. She measures her students with a knowledge pretest, a post-test, and a delayed post-test.
-Which of the following is an independent variable in Audrey's study?

A) Ability
B) Fifth grade
C) Post-test exam
D) Science principles