Psychology, Department of


Date of this Version



Behavioral and Brain Sciences 20:3 (September 1997), pp. 525–532.

doi: 10.1017/S0140525X97001519


Copyright © 1997 Cambridge University Press. Used by permission.


[SFS] When Genotype × Environment (G × E) interactions are present, heritability estimates are not interpretable. Mealey cites abundant evidence for G × E interactions in the etiology of sociopathy, thereby completely undermining estimates of the heritability of sociopathy which form the foundation of her model. Without proper evidence for a genetic basis of sociopathy, Mealey’s sociobiological model collapses under its own great weight.

[LM] It is impossible to discuss the constructs “heritability,” “theory of mind,” and “normality” in a single coherent essay. The following three rejoinders address each of these exceedingly complex constructs individually, as each relates to the two-path model of sociopathy and psychopathy.

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