To examine changes in semantic memory organization and use during aging, we recorded
event-related potentials as younger and older adults listened to sentences ending with the
expected word, an unexpected word from the same semantic category, or an unexpected
word from a different category. Half of the contexts were highly constraining. In both groups,
expected words elicited less negativity 300–500 ms (N400) than unexpected ones, and
unexpected words elicited smaller N400s when these were categorically related. Whereas …

Federmeier, KD, McLennan, DB, De Ochoa, E., & Kutas, M.(2002). The impact of semantic
memory organization and sentence context information on spoken language processing by
younger and older adults: An ERP study. Psychophysiology, 39, 133–146. Figures 1, 4, and
5 were incorrectly printed in the issue. These figures, in their correct format, can be seen on
pages 685–687. Masaki, H., Takasawa, N., & Yamazaki, K.(2000). An electrophysiological
study of the locus of the interference effect in a stimulus-response compatibility paradigm …