Unformatted text preview: ective placement and smilarities in fostering envts as well as by
genetic factors 2. Heritability
A statistical estimate of the proportion of the
measured variance on a given trait among
individuals in a given population that is
attributable to genetic differences among
Limitations: , not to the individuals
living at a particular time
of people who grow up in very different envts
They can differ markedly for groups High heritability does not imply immutability They say nothing about differences
They apply only to populations
They apply only to a particular group between groups 3. Environmental Effects
Most obvious source of shared environment is growing up
together in the same family.
Behavioral geneticists, however, have found surprisingly little
effect of shared environment on some aspects of development.
Nonshared environment effects include experiences unique
to the individual. -siblings may have quite different experiences within the same family and their experiences outside the family may
-the primary eff...
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