The pitch of sound is determined by its ________; the loudness of sound is determined by its ________

In a ______ design, research subjects are unaware as to whether they are assigned to the experimental group or the control group.

a.) double-blind b.) biased c.) blind d.) triple-blind

Television ads that are in black and white are just trying to take advantage of which attention getting technique?

a. loudness b. motion c. contrast d. repetition