According to the textbook, science does not know why people sleep, but researchers have developed some convincing and persuasive theories.

Which of the following theorists hypothesized that his theory involves "conflicts, inner and outer, which the vital personality weathers, re-emerging from each crisis with an increased sense of inner unity, with an increase of good judgment"?

A) Sigmund Freud B) Erik Erikson C) John Watson D) Ivan Pavlov

Titchener's opinion about how introspection should be used probably became formed ____.?

a. ?before he went to Leipzig b. ?while working with Wundt in Leipzig c. ?when he returned to Oxford after leaving Leipzig d. ?when he was at Cornell e. ?during a visit to Clark University, in a discussion with Freud