The personality functioning of adults diagnosed with attention deficit
disorder (ADD) without comorbid psychiatric illness was examined. NEO
PI-R profiles in a group of 25 adults referred for ADD evaluation mee
ting criteria for this diagnosis without any history of other psychiat
ric disturbance were compared to profiles from a control group of 23 n
onpsychotic adult outpatients being treated with psychotherapy. All pa
rticipants completed self-report measures of ADD symptoms as well as t
he NEO PI-R (Form S). The ADD adult group obtained significantly highe
r scores in the Neuroticism domain and significantly lower scores in t
he Conscientiousness domain than the outpatient comparison group. The
NEO PI-R appears useful to the understanding of ADD in adulthood.