The percentage of the human population lost to war today has decreased since the time of the hunter–gatherers. One possible reason is that between-group violence has been reduced by ____
a. ?increasing economic dependencies among nations
b. ?evolutionary genetic changes
c. ?lower testosterone levels among males
d. ?changes in child-rearing practices and values
ANSWER:
a
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What does the third-variable problem indicate?
A) The three variables are all causally related to one another; each is a cause of the others. B) The correlation between any two of the variables must be established before another correlation can be computed. C) Two of the variables are correlated with each other only because each is causally related to a third variable. D) Changes in one variable are producing changes in another variable.
Available research suggests that the majority of defendants found not guilty by reason of insanity have been diagnosed with __________.
A. bipolar disorder B. major depression C. intellectual disability D. psychosis
__________ is a substance-induced disorder involving a cluster of symptoms that occur when a person abruptly stops using a particular substance following a period of prolonged and heavy use
a. Tolerance c. Withdrawal b. Intoxication d. Potentiation
Using amphetamines to alter performance on intellectual tasks typically leads to an increase in
a) quality of work, but not quantity. b) quantity of work, but not quality. c) both quantity and quality of work. d) neither quantity nor quality of work.