Perceiving objects or events that have no external reality describe

Professor Zander wants to know how loud a certain noise must be in order to be heard from a distance of 50 feet. This question involves the concept of _______

a. relative magnitude b. difference threshold c. absolute threshold d. inverse discrimination

The four elements of persuasion identified by researchers are the medium, the message, the _____ and the _____

a) emotion; cognition. b) product; price. c) foot in the door; door in the face. d) audience; source.