To establish the credibility of any source you name, you need to briefly explain that individual's _______

Aggressiveness is destructive, while argumentativeness is constructive

a. true b. false

When setting up an experiment, researchers must define a variable in one of two ways. One can define variables in terms of:

a. message features and observed effects b. message features and intended effects c. observed effects and message length d. observed effects and message valence