In a research study by Jeng et al., (2000), what percentage of very-low-birth-weight (VLBW) infants were walking by 18 months of age?
a. 50%
b. 89%
c. 100%
d. It depended upon the sex of the child.
b
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Meta-analyses of studies exploring the connection between psychosis and marijuana use conclude that ____
a. risk of psychosis is decreasedby 75 percent in marijuana users b. heavy use of marijuana increases the risk of psychosis by 50to 200 percent c. psychotic symptoms observed with heavy marijuana use are due to the transitory effects of intoxication d. estimates states that up to 25 percent of the cases of psychosis might not have occurred if marijuana had not been used
According to research on the testing effect,
a. although testing can improve recall, it is not as helpful as spending the same amount of time studying. b. testing consistently improves recall, no matter whether the retention interval is short or long. c. this effect operates only when students receive feedback on their test scores. d. one explanation is that test-taking creates desirable difficulties.
The area of behavioral genetics suggests that genetic factors:
a. are fixed b. set a range for behaviors c. do not interact with the environment d. account for more than 75% of the development of personality traits
A person who has problems with body image, sex role confusion, heavy life stressors and emotional instability could be at risk for developing bulimia as predicted by which theory?
a. sociocultural theory b. clinical/psychiatric theory c. epidemiological/risk factors theory d. physiological factors approach