Harris: The Postcard Version
For clarification, I sent Judy Harris one last email:
Me:
One last question. Are the following two propositions a correct summary
of your view?
1. Shared *family* environment has virtually no effect on personality or
outcomes (income, education, health, etc.).
AND
2. Shared environment (c2 in standard heritability estimates) has a
small effect on both personality and outcomes?
Or would you instead say:
2′. Shared environment (c2 in standard heritability estimates) has
virtually no effect on personality, but a small effect on outcomes?
Harris:
One last question. Are the following two propositions a correct summary of your view?
1. Shared *family* environment has virtually no effect on personality or outcomes (income, education, health, etc.).
Yes, that is a correct summary of my views.
2. Shared environment (c2 in standard heritability estimates) has a small effect on both personality and outcomes?
Or would you instead say:
2′. Shared environment (c2 in standard heritability estimates) has virtually no effect on personality, but a small effect on outcomes?
The second. Virtually no effect on personality but a small effect on other outcomes, including IQ.
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