Personality traits, such as impulsivity, that are associated with externalizing are characterized by a similar reduction in the ERN (e.g., Potts et al., 2006); along similar lines, individuals who are characterized by insensitivity to punishment have reduced ERNs in the context of punishment but not reward (Dikman & Allen, 2000). These results support the notion that a reduced ERN appears related to the externalizing dimension of personality and psychopathology.
