GROWTH DEVELOPMENT CHILD
INDIVIDUAL DIFFERENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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lower when they are raised together tan when they are raised apart
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greater than that for fraternal twins raised together
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the same whether they are reared together or apart.
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lower than that for any other blood relatives.
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Detailed explanation-1: -The correlation of intelligence test scores for identical twins raised together is about +. 85. For fraternal twins raised together, it is about +. 60.
Detailed explanation-2: -Intelligence scores are affected by both genetics and the environment. Siblings can differ in their genetic similarity, from 100% in identical twins to 50% in fraternal twins and different-aged siblings. They also differ in the similarity of their environment (more similar if raised together than apart).
Detailed explanation-3: -No, identical twins do not have the same IQ, but their IQ is more similar than nonidentical twins and brothers and sisters in general. Parents and children also have a genetic intellectual relationship, but like identical twins, it is not a one to one correlation.
Detailed explanation-4: -Answer» A. higher when they are raised together than when they are raised apart.
Detailed explanation-5: -It was concluded, among many other things, that identical twins are about 85 percent similar for IQ, whereas fraternal twins are about 60 percent similar. This would seem to indicate that half of the variation in intelligence is due to genes.