The revised Neuroticism (N), Extraversion (E), Openness (O) to experience P
ersonality Inventory (NEO-PI-R) is a multidimensional measure of normal per
sonality traits that is intended to assess five major personality dimension
s or domains-N, E, O, Agreeableness (A), and Conscientiousness (C). Althoug
h several studies have been conducted examining N, E, and O factors in peop
le 65 through to 85 years old, there has been little research examining all
five-core domains of personality in individuals 85 and older. We compared
the NEO-PI-R domains and facet traits in the middleaged/young-old versus ol
d-old normal subjects. Thirty-eight community-dwelling subjects (22 women,
16 men) free from major neuropsychiatric disorders were given the NEO-PI-R,
a self-administered 240-item personality inventory, assessing 30 facet tra
its within the five domains. We compared the scores of 21 middle-aged and y
oung-old (age 50-84) individuals, to those of 17 old-old (age 85-100) subje
cts. The personality profiles of the two groups were similar except that th
e old-old group had lower scores on Extraversion, and four of the 30 facet
traits (warmth, positive emotions, impulsiveness, and order) compared to th
e middle-aged/young-old group. These results were limited by the cross-sect
ional design and small sample size. Nonetheless, the findings suggest that
the middle-aged/young-old and the old-old normal subjects have fairly simil
ar personality traits.