Severely depressed people are more likely to take their lives
a. as their situations improve
b. only if someone asks directly if they are suicidal
c. when they are most depressed
d. when they have high levels of serotonin
Answer: A
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Mothers of 1-month-old infants have reported that __________.
A. they observed little nonverbal expression in their children B. only joy was observed in their children by that age C. they felt their child had shown expressions of interest and joy D. their children had experienced no recognizable emotions during the first month of life
The narrower the confidence interval, the more precise it is. With this in mind, which combination of factors will produce the most precise estimate of the difference between two population means?
a. Two samples of n = 20 and 80% confidence b. Two samples of n = 20 and 90% confidence c. Two samples of n = 50 and 80% confidence d. Two samples of n = 50 and 90% confidence
Young people are less likely than older drivers to wear seat belts. In serious car crashes, occupants not wearing seat belts are ____ likely to be killed and ____ as likely to be injured compared with those wearing seat belts
a. 25% more; twice b. twice as; three times c. 75% more; six times d. half as; eight times
A method of testing a theory or hypothesis in which a positive result disconfirms the predictions made by that theory or hypothesis is called ______.
A. discontinuous strategy B. comprehensive strategy C. confirmational strategy D. disconfirmational strategy