Abstract
Boundary extension is a phenomenon in which an individual remembers seeing more of a scene than was actually shown. The current study evaluated a multisource model of boundary extension in which the phenomenon is considered to be a false memory elicited by internally generated information, and to be induced by a source-monitoring error. Eighty students completed a rating scale commonly used to assess boundary extension, as well as two cognitive tasks, the Deese-Roediger-McDermott paradigm and a self-rating of the vividness of subjective visual representation. Magnitude of boundary extension was significantly correlated with the measures of false memory, but not with the measures of source-monitoring error. These results were partially consistent with the multisource model.
