Zack believes that drinking milk improves memory. He conducts an experiment in which he randomly chooses a group of participants and randomly divides them into two groups. Group A drinks milk before trying to remember a list of nonsense syllables. Group B drinks nothing before trying to remember a list of nonsense syllables. The experimental group in this experiment is ____.?
a. ?the number of nonsense syllables remembered
b. ?Group A
c. ?the level of thirst before drinking the milk
d. ?Group B
ANSWER:
b
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The "all or nothing event" refers to the fact that
a. nerve cells are continually in an action potential. b. action potentials occur completely or not at all. c. synaptic transmissions occur completely or not at all. d. all the neurons in the brain fire or none of them fire.
In their research on the role of the serotonin transporter gene in depression, Caspi and his colleagues demonstrated that depressive episodes were:
A) most likely to occur in individuals with two long alleles under high-stress conditions. B) more correlated with genetic than with environmental factors. C) more correlated with environmental than with genetic factors. D) the product of genetic and environmental interactions.
Activity in the left hemisphere is associated with ____.
A. decreased emotional experiences B. fear, but not other emotions C. behavioral activation D. behavioral inhibition
Phobic disorders are a type of ____.?
a. ?mood disorder b. ?schizophrenic disorder c. ?somatoform disorder d. ?anxiety disorder