Although monthly breast self-examination (BSE) is recommended for early bre
ast cancer detection, most women do not comply. Few studies have examined t
he impact of psychological distress on BSE frequency. Recent research sugge
sts that it may be particularly important to examine the role of distress i
n the recently identified phenomenon of BSE overperformance (>1/month). One
hundred thirty-five healthy women with and without family histories of bre
ast cancer completed sociodemographic, health belief general and cancer-spe
cific psychological distress, and BSE frequency questionnaires. The central
finding of the study was that BSE underperformance and overperformance had
two distinct sets of predictors: health beliefs, specifically barriers aga
inst BSE and low confidence in BSE performance, were related to BSE underpe
rformance, while higher levels of psychological distress, particularly canc
er-specific intrusive thoughts, were related to BSE overperformance. Findin
gs underscore the need to evaluate BSE under- and overperformance separatel
y and to develop problem-specific interventions to increase compliance with
monthly BSE.