The most common behavioral expression of anxiety is

Which of the following is true of research on insight?

a) Researchers have found that only human beings are capable of insight learning. b) Researchers have found support for the existence of both human and animal insight learning. c) Researchers have found that apes are capable of insight only after being taught this by humans. d) Researchers have proven that all creatures, even one-celled organisms such as the amoeba, are capable of insight learning.

Police detectives often begin an interrogation with a belief that the suspect is guilty. This presumption of guilt can apparently influence the way a detective conducts the questioning. The danger here is that, under these conditions, the detectives will seek out information that verifies that belief and overlook information that does not fit. Suspects, in turn, act more defensively and are more

likely to look guilty. This process is referred to as A. interrogation proper. B. behavioral confirmation. C. a preinterrogation "softening up" of the suspect. D. the interrogator's arsenal.