When used to measure attitudes, physiological measures such as heart rate and perspiration
a. are particularly susceptible to social desirability bias.
b. reveal the intensity of an attitude.
c. reveal whether an attitude is positive or negative.
d. are easier to control than behaviors such as nodding.
Question 2
Wells and Petty (1980) videotaped students as they listened to a speech. The results of this study indicated that
a. students revealed the intensity, but not the direction, of their attitudes through their body language.
b. students' self-reported attitudes did not agree with their observed attitudes.
c. students signaled their attitudes by nodding or shaking their heads.
d. horizontal head movements indicate agreement, whereas vertical head movements indicate disagreement.