In a set of research studies described in the text, a group of two-year olds were initially categorized as being inhibited or uninhibited. Twenty years later, the participants
A) retained some of the basic brain properties relating to temperament that initially differentiated the two groups.
B) had the same chance of developing a personality disorder regardless of which group they were originally in.
C) were diagnosed with narcissistic and histrionic personality disorders more often if they were in the uninhibited group.
D) lost all of the basic brain properties relating to temperament that initially differentiated the two groups.
A
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As we age, we are more likely to need glasses because
A) of damage to our corneas. B) of damage to our retinas. C) the lens loses its flexibility. D) the retina can no longer accommodate subtle changes in light.
What is the general result of studies of intelligence involving twins, siblings, and unrelated siblings raised in the same household?
a. The role of nature and nurture – genetics and environment – were found to be exactly equal, meaning that even people born with the genes for high intelligence could end up with low IQs if their environment was not adequate support of their cognitive growth. b. Because identical twins always had identical intelligences, it was determined that the role of environment on intelligence is non-existent, and that it is an entirely genetic phenomenon. c. Because children raised in nurturing, enriching households always had higher IQs than children raised in neglectful households, it was determined that environment is more important than genetics in the determination of intelligence. d. Ultimately genetics are more influential than environment on an individual's intelligence.