Question

Dr. Freedom conducted an experiment to determine whether varying the sound level would

      effect participant’s evaluation of a video. Participants were randomly assigned to watch the

      same video with the sound level set at high, medium, or low.   In this example, the

      independent variable is

           

Select one:

a. the evaluation of the video.

b. the sound level of the video.

c. the video.

d. high, medium, and low.

Answer 1

Solution:

Given: Dr. Freedom conducted an experiment to determine whether varying the sound level would effect participant’s evaluation of a video.

Here Dr. Freedom trying to find out what effect would occur on participant’s evaluation of a video by changing the sound level.

So the evaluation of the video depends on the sound level of the video.

Thus independent variable is:

b) the sound level of the video.