The high school student who invented a practical form of television was ________

When a speaker gestures to emphasize an important point, he or she is using ______.

a. iconic gestures b. deictic gestures c. emblematic gestures d. batonic gestures

Some research indicates that people are more inclined to do something because their friends and neighbors do it-for example, inoculate their children-than because their physician tells them to. Which principle of persuasion does this illustrate?

A. commitment B. authority C. social validation D. scarcity