Suppose that the heritability coefficient of intelligence is roughly 0.5.This means that:
A)50% of intelligence is due to genetics,and 50% is due to environmental factors.
B)50% of intelligence is due to genetics,and 50% is due to unspecified factors.
C)intelligence is completely determined by genes in 50% of the population.
D)about 50% of the variability in intelligence scores can be explained by genetic differences.

Question

Quizplus · Accepted Answer

The heritability coefficient of intelligence being roughly 0.5 means that about 50% of the variability in intelligence scores can be explained by genetic differences among individuals. This does not necessarily mean that intelligence is completely determined by genes in 50% of the population as there are also environmental factors that can influence intelligence. Choice A is incorrect as it suggests that genetics and environmental factors are equally responsible for intelligence, which is not necessarily the case, and choice B is incorrect as it suggests that the other 50% of intelligence is due to unspecified factors, which is not supported by research on heritability.

Suppose That the Heritability Coefficient of Intelligence Is Roughly 0