A report in a research journal describes the symptoms of a mental disorder along with information on its etiology, including a heritability of 50 percent. How should this finding be interpreted?
a. Genetic factors and the environment contribute about equally to this disorder.
b. Half of the people who suffer from the disorder have a genetically caused disorder.
c. Half of the children of carriers of this disorder will actually develop the disorder.
d. Geneticists have identified half of the genes thought to be responsible for this disorder.
Answer: a.
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If Ethan experiences a big jolt of cortisol due to a stressor late in the evening, how will his sleep likely be affected?
a. ?He will sleep heavily and have difficulty waking up. b. ?He likely will have difficulty falling asleep and may wake frequently during the night. c. ?He will sleep lightly but soundly. d. ?He will fall asleep promptly but may wake frequently during the night.
The brains of people with antisocial personality disorder often exhibit _____ activity in the _____.
A) decreased; prefrontal cortex B) increased; nucleus accumbens C) decreased; amygdala D) increased; hippocampus