In what way did the National Opinion Research Center's study of sexual behavior differ from earlier research on the topic?
a) They surveyed women as well as men.
b) They used a randomly selected sample.
c) Children and adolescents were interviewed.
d) Cross cultural attitudes in the media were examined.
b
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Suppose Maria's mental age is 20 and her chronological age is 10. What is her IQ?
a) 320 b) 80 c) 200 d) 100
The research comparing the IQ scores of twins has what limitation?
a. Most of the data come from children of prisoners and mental patients. b. Most of the data come from families with more than four children. c. Most of the data come from middle-class families. d. Most of the data come from preschool children.
The purpose of a control group in an experiment is to:
a. serve as a check on the interpretation of results. b. increase the ability to generalize the findings. c. manipulate the dependent variable. d. represent the general, nonlaboratory population.
What do transcranial direct current stimulation and transcranial magnetic stimulation have in common?
A. Both allow researchers to excite or inhibit neuron activity. B. Both cause permanent changes in subjects' brain activity. C. TMS and tDCS are both invasive procedures. D. TMS and tDCS use magnetic fields to improve cognition.