Behavioral geneticists use heritability coefficients _____.
To estimate the heritability of a particular attribute from twin data, a researcher would have to know
If we find that identical twins raised together are notably dissimilar on an attributelike IQ, that is known to be genetically influenced, we can conclude thata.shared environmental influences are responsible for the dissimilarityb.nonshared environmental influences are responsible for the dissimilarityc.genotype is notresponsible for the dissimilarityd.shared environmental influences are responsible for the dissimilarity and genotype is notresponsible for the dissimilarity*e.nonshared environmental influences are responsible for the dissimilarity and genotype is not responsible for the dissimilarityThe only thing that can keep identical twins reared together from resembling each other on an attribute is nonshared environmental influences. Therefore, it makes sense that we could estimate how much nonshared environment (NSE) contributes to the attribute as follows: NSE =a.(r identical twins- r fraternal twins) X 2b.1 - (H + SE)