on individual differences is accordingly diminished. What might this mean in concrete terms? Our results suggest that children experiencing conflictive parenting are, on average, prone to higher levels of CP, and that this increase is due largely to the common family environment. By contrast, to the extent that children experiencing low-risk parenting engage in CP, their behavior appears to be largely a function of genetic influences. Put differently, because such children are experiencing little by way of environmental risk for CP, the remaining individual differences are largely genetic in origin.