The heritability index for intelligence is approximately .50,meaning that:
A)genetic factors are 50% more important than environmental factors in determining intelligence.
B)parents with above-average intelligence have a 50% chance of having a child with above-average intelligence.
C)about half of the variability in intelligence scores in the population can be attributed to environmental factors.
D)intelligence is completely the result of genes for 50% of people.

Question

Quizplus · Accepted Answer

The heritability index of .50 means that about half of the variability in intelligence scores in the population can be attributed to environmental factors, while the other half can be attributed to genetic factors. It does not mean that genetic factors are more important than environmental factors or that intelligence is completely the result of genes for 50% of people. Additionally, it does not mean that parents with above-average intelligence have a 50% chance of having a child with above-average intelligence, as heritability is a population-level statistic and not a prediction for an individual child.

The Heritability Index for Intelligence Is Approximately