Scientists destroyed a tiny area of a cat's limbic system by inserting a tiny electrode into this target area and then passing an electric current through the electrode. The technique used is known as

Garland chews gum constantly. He gets anxious when he runs out of it. Freud would

He is overconcerned with having fresh breath for social situations. He is harboring an unresolved conflict from the oral stage of development. He has learned that chewing gum may reduce the development of dental caries. He is imitating his father, who also chewed gum.

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