Because identical twins separated at birth did have

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Introductory Psychology
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Chapter 2 / Exercise 10
Introductory Psychology
Rathus
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686.Because identical twins separated at birth did have the same prenatal environment and are often placedin homes that are socially and educationally similar, some researchers believe that intelligence would seem toa.be 80 percent hereditary.b.be 65 percent hereditary.c.be less than 50 percent hereditary.d.have no hereditary basis.ANS: CPTS:1DIF:DifficultREF:Questioning Intelligence-How Intelligent Is the Idea of Intelligence?OBJ:8.10.4KEY:Fact687.Which of the following comparisons would be MOST useful to support an argument regarding the effects of environment on intellectual differences?a.IQ correlations between fraternal twins compared with correlations between identical twinsb.IQ correlations between identical twins reared together with correlations between identical twins reared apartc.comparison of families with one adopted child and one biological childd.comparisons of adopted identical twins and adopted fraternal twinsANS: CPTS:1DIF:DifficultREF:Questioning Intelligence-How Intelligent Is the Idea of Intelligence?OBJ:8.10.4KEY:Concept688.Support for the environmentalist viewpoint of intelligence comes froma.the finding that the environment accounts for 70 to 80 percent of intelligence.b.studies showing that children reared by the same mother resemble her IQ to the same degree, whether or not they share her genes.c.studies showing that test tube baby twins have IQs more similar to the surrogate mother than to the natural mother.d.studies demonstrating greater similarity between a child’s intelligence and their biological, rather than their adoptive, parents.ANS: BPTS:1DIF:DifficultREF:Questioning Intelligence-How Intelligent Is the Idea of Intelligence?156
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Introductory Psychology
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Chapter 2 / Exercise 10
Introductory Psychology
Rathus
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OBJ:8.10.4KEY:Concept689.In studies of families with one biological child and one adopted child, the results concluded thata.the biological child had an IQ similar to the mother’s IQ, but the adopted child did not.b.the adopted child’s IQ was almost identical to his or her biological mother’s IQ, although reared away from her.c.both the biological and adopted child had IQs similar to the mother that was rearing them.d.the adopted child’s IQ was always significantly below the IQ of both his or her adopted mother and adopted sibling.ANS: CPTS:1DIF:DifficultREF:Questioning Intelligence-How Intelligent Is the Idea of Intelligence?OBJ:8.10.4KEY:Fact

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