In the communication model, the term sender must always refer to a person

The early work of Hovland on Attitude Change was done with

thousands of _______________ as subjects. A. students B. soldiers C. office workers D. factory workers E. psychologists

Video and audio segments included in public presentations should __________.

A. Be at least two minutes in length B. Be used sparingly C. Come from the Microsoft image suite D. None of the above