In a study of severely deprived Romanian orphans who were later adopted, those who had been institutionalized past age 6 months showed
A) average mental test scores by adolescence.
B) serious intellectual defects.
C) little or no catch-up in physical size.
D) no improvement in mental test scores during middle childhood.
B
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When determining the cross-products for your correlation coefficient, if positive z scores on one variable go with negative z scores on the other variable and negative z scores on one variable go with positive z scores on the other variable, then the correlation coefficient will be:
a. negative. b. strong. c. weak. d. positive.
Which of the following would most likely help someone adjust to jet lag?
a. taking a nap during the day b. taking melatonin when you need to wake up c. keeping the room light when you need to stay awake d. darkening the room when you need to stay awake
Rates of smoking go up as SES goes down. This is an example of:
a. a positive correlation c. a partial correlation. b. a negative correlation d. multivariate analysis of variance.
A graph of a two-factor study indicates an interaction when the lines on the graph ____
a. are parallel b. cross or converge c. are steep in slope d. have the same slope