10) heritability estimates
a)give precise information on how personality traits develop.
b)are likely to diminish the role of heredity because the environments of twin pairs are
less diverse.
c)tell researchers how environment can modify genetic influences.
d)are controversial measures because they can easily be misapplied.
11) children with adhd
a)tend to score higher than other children on intelligence tests.
b)are often asymptomatic before age 7.
c)find it hard to ignore irrelevant stimuli.
d)have no difficulty with planning or reasoning.
12) which of the following is a true statement about preventing childhood injury?
a)during the past 30 years, parents have changed a great deal in the amount they do to
protect their children from injury.
b)in the united states, more than 80 percent of infant seats and 40 percent of child
booster seats are improperly used.
c)in the united states, about 15 percent of parents fail to place their children in car
safety seats.
d)young children properly restrained in car safety seats have a 50 percent reduced risk
of fatal injury.
13) mr. klakkit provides his fourth-graders with lessons that emphasize respect and