Control in experimentation involves:
a. manipulating the independent variable.
b. controlling any relevant extraneous variable.
c. randomly assigning participants.
d. all of the above.
d
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Stefan and Darnell have been diagnosed with schizophrenia. Stefan walks around the room rapidly, talking endlessly, and swinging his arms. Darnell stands in one position for hours at a time, responding to nothing. Which statement is true about their behavior?
a. Both Stefan's and Darnell's behaviors are common motor disturbances seen in schizophrenia. b. Stefan's behavior is typical of schizophrenia; Darnell's is extremely unlikely. c. Stefan's behavior never occurs in schizophrenia; Darnell's behavior is typical of schizophrenia. d. Neither Stefan's nor Darnell's behavior occurs in schizophrenia.
Lewis Terman and the other psychologists who adopted IQ tests for use in the United States in the early 1900s believed that intelligence is ____.?
a. ?solely influenced by the environment b. ?fixed and inherited c. ?influenced by the reaction range d. ?nonexistent