A Rose by Any Other Name: Long-Term Memory Structure and Sentence Processing

Kara D. Federmeier, Marta Kutas

Research output: Contribution to journalArticle

Abstract

The effects of sentential context and semantic memory structure during on-line sentence processing were examined by recording event-related brain potentials as individuals read pairs of sentences for comprehension. The first sentence established an expectation for a particular exemplar of a semantic category, while the second ended with (1) that expected exemplar, (2) an unexpected exemplar from the same (expected) category, or (3) an unexpected item from a different (unexpected) category. Expected endings elicited a positivity between 250 and 550 ms while all unexpected endings elicited an N400, which was significantly smaller to items from the expected category. This N400 reduction varied with the strength of the contextually induced expectation: unexpected, categorically related endings elicited smaller N400s in more constraining contexts, despite their poorer fit to context (lower plausibility). This pattern of effects is best explained as reflecting the impact of context-independent long-term memory structure on sentence processing. The results thus suggest that physical and functional similarities that hold between objects in the world - i.e., category structure - influence neural organization and, in turn, routine language comprehension processes.

Original languageEnglish (US)
Pages (from-to)469-495
Number of pages27
JournalJournal of Memory and Language
Volume41
Issue number4
DOIs
StatePublished - Nov 1999
Externally publishedYes

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Keywords

  • Categorization
  • Event-related potentials
  • N400
  • Sentence processing

ASJC Scopus subject areas

  • Neuropsychology and Physiological Psychology
  • Language and Linguistics
  • Experimental and Cognitive Psychology
  • Linguistics and Language
  • Artificial Intelligence

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