This study assessed the impact of epilepsy on self-perceptions and fac
tors associated with variations in this impact. In a previous study by
the author in Britain, a measure of the impact of epilepsy on self-pe
rceptions was shown to be the most powerful predictor of psychosocial
well-being. The present study represents a development of the earlier
study using a larger multinational sample and has a particular focus o
n this apparently important variable. A sample of 948 adults with epil
epsy drawn from various regions of Britain, the United States, and New
Zealand was investigated. Although the sample was composed mainly of
support group members, there was much variation within it in terms of
a range of epilepsy-related and background characteristics. In the res
earch questionnaire, impact of epilepsy on self-perceptions was assess
ed through the discrepancy between 20 ratings of current self-percepti
ons and 20 corresponding ratings for anticipated self without epilepsy
. Initial findings showed that overall people do anticipate that their
self-perceptions would be more positive if they did not have epilepsy
. When factors associated with variations in impact of epilepsy were s
tudied, a high impact was noted to be associated with the following: l
owered psychosocial well-being, high seizure frequency, poor seizure c
ontrol, a perceived uncertainty over diagnosis, having experienced sei
zures for some time, and polytherapy rather than monotherapy. The find
ings are discussed, and the relationships between efficacy of medical
treatment, self-perceptions, and vulnerability to stigmatizing agents
and misinformation are highlighted.