Question

an experiment is designed to compare the differences in learning outcomes between learning math from a video game and learning it from traditional classroom activities. the experiment finds no difference between the two. which experiment method is important for controlling bias? a. asking the subjects which group they preferred to be in b. developing a video game with subjects input c. randomly assigning students to the two different groups d. using classroom activities with researchers input

Explanation:

In experimental design, random assignment (randomly putting participants into groups) is a key method to control bias. It helps ensure that each group is similar in characteristics, reducing the chance of confounding variables. Option A (asking subjects' preference) can introduce self - selection bias. Option B (developing game with subjects' input) and D (using classroom activities with researchers' input) don't address bias control through group assignment.

Answer:

C. Randomly assigning students to the two different groups