A survival analysis of fixation times in reading

  • Authors:
  • Mattias Nilsson;Joakim Nivre

  • Affiliations:
  • Uppsala University;Uppsala University

  • Venue:
  • CMCL '11 Proceedings of the 2nd Workshop on Cognitive Modeling and Computational Linguistics
  • Year:
  • 2011

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Abstract

Survival analysis is often used in medical and biological studies to examine the time until some specified event occurs, such as the time until death of terminally ill patients. In this paper, however, we apply survival analysis to eye movement data in order to model the survival function of fixation time distributions in reading. Semiparametric regression modeling and novel evaluation methods for probabilistic models of eye movements are presented. Survival models adjusting for the influence of linguistic and cognitive effects are shown to reduce prediction error within a critical time period, roughly between 150 and 250 ms following fixation onset.