The heritability of intelligence refers to:
a. the extent to which an individual's intelligence is attributable to genetic factors.
b. the percentage of variation in intelligence within a group that is attributable to genetic factors.
c. the extent to which a group's intelligence is attributable to genetic factors.
d. a general underlying intelligence factor that is measured by every task on an intelligence test.
Answer: b. the percentage of variation in intelligence within a group that is attributable to genetic factors.
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