In addition to providing converging evidence for distinct domains of psychopathology marked by excessive fear or pervasive distress (internalizing disorders) or by deficient impulse control (externalizing disorders), the current work also sheds new light on a key unanswered question emerging from dimensional-structural studies: What accounts for the overlap between internalizing and externalizing disorders, reflected in moderate-to-high correlations among factors and subfactors in dimensional models of comorbidity?
