Language in context: Characterizing the comprehension of referential expressions with MEG

Christian Brodbeck, Liina Pylkkänen

Research output: Contribution to journalArticle

Abstract

A critical component of comprehending language in context is identifying the entities that individual linguistic expressions refer to. While previous research has shown that language comprehenders resolve reference quickly and incrementally, little is currently known about the neural basis of successful reference resolution. Using source localized MEG, we provide evidence across 3 experiments and 2 languages that successful reference resolution in simple visual displays is associated with increased activation in the medial parietal lobe. In each trial, participants saw a simple visual display containing three objects which constituted the referential domain. Target referential expressions were embedded in questions about the displays. By varying the displays, we manipulated referential status while keeping the linguistic expressions constant. Follow-up experiments addressed potential interactions of reference resolution with linguistic predictiveness and pragmatic plausibility. Notably, we replicated the effect in Arabic, a language that differs in a structurally informative way from English while keeping referential aspects parallel to our two English studies. Distributed minimum norm estimates of MEG data consistently indicated that reference resolution is associated with increased activity in the medial parietal lobe. With one exception, the timing of the onset of the medial parietal response fell into a mid-latency time-window at 350–500 ms after the onset of the resolving word. Through concurrent EEG recordings on a subset of subjects we also describe the EEG topography of the effect of reference resolution, which makes the result available for comparison with a larger existing literature. Our results extend previous reports that medial parietal lobe is involved in referential language processing, indicating that it is relevant for reference resolution to individual referents, and suggests avenues for future research.

Original languageEnglish (US)
Pages (from-to)447-460
Number of pages14
JournalNeuroImage
Volume147
DOIs
StatePublished - Feb 15 2017

    Fingerprint

Keywords

  • EEG
  • MEG
  • Reference resolution
  • Sentence comprehension
  • Visual short-term memory

ASJC Scopus subject areas

  • Neurology
  • Cognitive Neuroscience

Cite this