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Scenario II
For centuries,people have made the observation that intelligence seems to run in families.In modern times,psychologists have confirmed that,indeed,there is a strong genetic component to intelligence.The degree of the association between genes and intelligence can be quantified using the heritability coefficient (h2) .In a population of diverse individuals differing in age,gender,race,and socioeconomic factors,the heritability of intelligence is approximately .5 to .7.This means that about 50-70% of the variability in intelligence scores is associated with genetic factors.Interestingly,the heritability coefficient changes depending on the group under investigation.For example,among wealthy children,the heritability coefficient exceeds .7 because the environments of these children are highly homogeneous.Among poor children,it drops to about .1.The heritability coefficient also tends to increase with the age of the population under investigation.For example,the heritability coefficient is approximately .3 in 3-year-olds and approximately .9 in 65-year-olds.
-(Scenario II) In which of these science-fiction scenarios would the heritability of intelligence be the lowest?
Congenital Analgesia
A rare condition where a person is born with an inability to feel physical pain.
Temperature Differences
Variations in temperature from one location to another or within a system, which can lead to various physical effects and phenomena.
Pressure
The force applied perpendicular to the surface of an object per unit area over which that force is distributed.
Proprioception
The sense of the relative position of body parts and strength of effort being employed in movement, essentially how we perceive the position and movement of our bodies.
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