A research team found that men who did not exercise had a higher rate of heart disease. Which of the following explanations illustrates the third-variable problem?
a) Heart disease might make it more difficult for men to exercise.
b) The relationship between exercise and heart disease might not be causal.
c) Including men who smoke in the study might erase the relationship between exercise and heart disease.
d) Smoking might cause both heart disease and reluctance to exercise.
d
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Monica experienced depression that emerged after she gave birth to her son, but failed to subside as Monica adjusted to hormonal changes in her body and the demands of motherhood. As a result, Monica's son, who is now 6 months old, most likely
A) sleeps longer than most infants. B) produces low levels of the stress hormone cortisol. C) tries to comfort his mother when she is sad. D) shows delays in motor and mental development.
The biological model of drug/alcohol addiction emphasizes a person's neurology and genetic predisposition
Indicate whether this statement is true or false.