Which of the following statements is true about graduates of the Carolina Abecedarian Project?
A) Treatment children sustained their IQ advantage until last tested at age 21.
B) Graduates of the school-age intervention maintained an IQ advantage only through middle school.
C) Interventions during infancy were not especially effective in boosting graduates' mental development.
D) Treatment children lost their IQ advantage during adolescence.
A
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When concordance rates are higher among monozygotic twins than dizygotic twins, this indicates which of the following?
a. There is partially a genetic basis. b. There is partially an environmental basis. c. There is a 100% environmental cause. d. There is a 100% genetic cause.
Emotional signals, usually from a child's parents, that influence the child's behavior are referred to as:
a. social adaptation cues b. social referencing c. synchrony d. scaffolding