Hajcak and colleagues (2007) demonstrated that ERN amplitude does not change after successful treatment in pediatric OCD. These findings have since been replicated in an additional report (Ladouceur, Dahl, Birmaher, Axelson, & Ryan, 2007). Another study that examined state-related changes in anxiety with spider phobic individuals found that the ERN amplitude did not change during symptom provocation with the presence of a tarantula (Moser et al., 2005). Combined, these studies suggest that the ERN is not affected by state-related changes in anxious symptoms.
