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Understanding underspecification: A comparison of two computational implementations.

Pavel Logačev1, Shravan Vasishth1

  • 1a Department of Linguistics , University of Potsdam , Potsdam , Germany.

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|March 11, 2016
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Summary
This summary is machine-generated.

This study tested underspecification models for syntactic ambiguity in sentence processing. Results showed no clear evidence for underspecification, but tentatively favored the non-specification model over the partial specification model.

Keywords:
Computational modellingShallow processingUnderspecification

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Area of Science:

  • Psycholinguistics
  • Cognitive Science
  • Computational Linguistics

Background:

  • The ambiguity advantage in sentence processing has been explained by the Unrestricted Race Model.
  • Task demands can influence syntactic ambiguity resolution strategies, leading to underspecification.
  • Individual differences in processing strategies may affect average behavioral data.

Purpose of the Study:

  • To evaluate two models of underspecification (partial specification model and non-specification model) against existing data.
  • To test predictions of the good-enough processing theory in sentence comprehension.
  • To provide a methodological framework for comparing real-time sentence processing models.

Main Methods:

  • Implemented and evaluated the partial specification model (PSM) and non-specification model (NSM).
  • Compared the fit of underspecification models to data from Swets et al. (2008).
  • Fitted baseline models assuming no underspecification for comparison.

Main Results:

  • A model without underspecification showed a better fit to the data than both underspecification models.
  • The non-specification model (NSM) provided a better fit than the partial specification model (PSM).
  • No unambiguous evidence for underspecification was found, but results tentatively support NSM over PSM.

Conclusions:

  • The findings suggest a need for further research into underspecification in sentence processing.
  • While not definitively proven, some level of underspecification may occur, with NSM being a more parsimonious explanation.
  • The study offers a valuable method for model comparison in real-time cognitive processes like sentence comprehension.