Twenty-five women with breast implants participated in semistructured inter
views designed to reveal their "mental models" of the processes potentially
causing local (ie, nonsystemic) problems. The authors analyzed their respo
nses in terms of an "expert model," circumscribing scientifically relevant
information. Most of the women interviewed had something to say about most
elements in the expert model. Nonetheless, gaps in their mental models unde
rmined decision making about their implants. One woman misunderstood the te
rms used by the medical community to describe implant failure (eg, rupture,
leak, and bleed). Another exaggerated the implants' vulnerability to direc
t impacts, such as car accidents. Participants also overestimated their abi
lity to detect localized problems and to select medical remedies. Although
they were generally satisfied with their own implants, many participants we
re dissatisfied with the decision-making processes that lead to their choic
e. Their interviews are interpreted by, the form and content of communicati
ons that women with implants need to help them manage their health decision
s better.