Why do infants from developing countries lag behind in their growth compared to infants from developed countries?
A. They have reduced access to medical care.
B. Their mothers carry them more, which thwarts their growth.
C. They breast-feed for a longer time.
D. They begin eating more solid food, but it is protein deficient.
Answer: D
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Why is it that older adults seem to have declines in their psychomotor speed and their working memories when compared to younger adults?
a. Because they experience a reduction in neurofibrillary tangles, which inhibits the ability of neurons to send messages at a maximally efficient speed. b. Because they experience a reduction in the ability of the corpus callosum to send messages from one cerebral hemisphere to the other. c. Because they experience more neuronal death in the diencephalon (the thalamus and hypothalamus), which hinders these cognitive skills. d. Because they show greater activation of the prefrontal cortex on easier tasks, thus "using up" their brain power before they ascend to more difficult tasks.
Which research study would you most expect to see from a researcher with a life-course perspective?
a. The effect of smoking on neurotransmitter systems and memory b. How memory processes change from infancy to old age c. Growing up in the 1960s, and its influence on drug-taking behavior in middle adulthood d. Sex differences in marital satisfaction
A researcher hypothesizes that children who learn to read using phonics will read better than those not taught in this manner. Identify I0 and Ha. Is this a one- or two-tailed test?
What will be an ideal response?
Which of the following is the best example of what linguists refer to as productivity?
A) "I wented to the store." (a 3-year-old) B) "I am six feet tall." (a 16-year-old) C) "I ain't very smart." (a 12-year-old) D) "Nobody likes me." (a 9-year-old)