The studies reported in this paper had two aims: (a) to identify which
psychological variables underlie people's overly positive assessments
of their own ability and (b) to explore the relationship between thes
e and actual ability. In a first study, over 300 drivers assessed thei
r driving ability in comparison to that of a novice. A positive view o
f own driving ability was directly related to the amount of accident-f
ree and endorsement-free driving experience a driver had had and the d
river's level of Neuroticism. It was negatively related to the number
of errors drivers reported in other everyday tasks. In a second study,
the actual driving skills of over 100 of the original subjects were a
ssessed by a driving instructor. It was found that self-assessments di
d not relate to actual ability, but instead to the comments made by th
e instructor and the subject's self-assessment as measured during the
earlier study. These results are discussed in terms of a stable, but i
naccurate, self-concept which is established as experience of the doma
in grows in the absence of contrary evidence.