Patty and Peter are using cross-sectional research methods to gather data from students who are of the same age. They will compare the data to that of students who are at a different age and presumably a dissimilar level of development. Researchers
refer to a group of subjects who are the same age and thus raised during the same time period is a(n) __________.
a) cohort
b) ethnographic sample
c) generation
d) control group
Answer: a
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Tamisha is so afraid of heights that she cannot enter buildings with more than two floors. Her cognitive-behavioral therapist would probably diagnose her with ____ and explain the problem in terms of ____
a. generalized anxiety disorder; faulty reasoning b. agoraphobia; genetic markers c. social phobia; repression and denial d. specific phobia; cognitive distortions
During his first three years of life, Jason has developed many motor skills like crawling, walking, and running that require his muscles to move efficiently and smoothly. In terms of brain function, Jason's motor development is the result of which process?
a. Stripping of the nodes of Ranvier b. Development of the myelin sheath c. Depolarization d. Development of action potentials e. Regulation of hormones
Neurons communicate with one another
a. by releasing neurotransmitters into the synapse. b. by releasing hormones from the hypothalamus. c. through the pituitary gland. d. using androgens.
Before calculating a Pearson correlation coefficient, it is advisable to plot the data because
a. one must be sure that the underlying relationship between the two variables is linear. b. the diagram is more informative than the correlation coefficient regarding causality. c. one must make sure that the data are from a truncated range. d. the correlation coefficient cannot show the direction of the relationship.