Decomposition, lookup, and recombination: MEG evidence for the full decomposition model of complex visual word recognition

Joseph Fruchter, Alec Marantz

Research output: Contribution to journalArticle

Abstract

There is much evidence that visual recognition of morphologically complex words (e.g., teacher) proceeds via a decompositional route, first involving recognition of their component morphemes (teach + -er). According to the Full Decomposition model, after the visual decomposition stage, followed by morpheme lookup, there is a final "recombination" stage, in which the decomposed morphemes are combined and the well-formedness of the complex form is evaluated. Here, we use MEG to provide evidence for the temporally-differentiated stages of this model. First, we demonstrate an early effect of derivational family entropy, corresponding to the stem lookup stage; this is followed by a surface frequency effect, corresponding to the later recombination stage. We also demonstrate a late effect of a novel statistical measure, semantic coherence, which quantifies the gradient semantic well-formedness of complex words. Our findings illustrate the usefulness of corpus measures in investigating the component processes within visual word recognition.

Original languageEnglish (US)
Pages (from-to)81-96
Number of pages16
JournalBrain and Language
Volume143
DOIs
StatePublished - Apr 2015

Keywords

  • Adult
  • Female
  • Humans
  • Magnetoencephalography
  • Male
  • Pattern Recognition, Visual
  • Photic Stimulation
  • Prefrontal Cortex
  • Reaction Time
  • Semantics
  • Temporal Lobe
  • Young Adult

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