Which statement about factors related to adolescent depression is true?
A. Twin studies indicate that depression is not influenced by genetic factors.
B. Twin studies indicate that depression is not influenced by environmental factors.
C. The short 5-HTTLPR gene is linked to depression, but only in the presence of negative life stressors.
D. The short 5-HTTLPR gene causes depression, even if negative life stressors are absent.
Answer: C
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a) True b) False
A desirable behavior may NOT be occurring for all of the following reasons except:
a. the behavior is not immediately reinforced when it occurs b. the behavior involves an increased response effort c. the behavior is negatively reinforced when it does occur d. competing behavior interferes with its occurrence
Which of the following is a way in which new drugs are discovered?
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Random assignment guarantees that participant characteristics do not become a confounding variable
a. True b. False Indicate whether the statement is true or false