Comte, in his theory of the development of scientific explanation, proposed a second stage, the ________ stage, which based its explanations of natural phenomena on unobserved causes and laws.

The two main types of behavioral learning are

a. reflexive responses and shaping. b. insight learning and operant conditioning. c. classical conditioning and operant conditioning. d. social learning and observational learning. e. reinforcement and insight learning.

Twin studies of __________ generally yield high heritabilities, whereas the role of heredity in __________ is less strong

A) bipolar disorder; autism B) schizophrenia; bipolar disorder C) Down syndrome; schizophrenia D) autism; major depression