Mislocated fixations during reading and the inverted optimal viewing position effect

A Nuthmann, R Engbert, R Kliegl

Research output: Contribution to journalArticlepeer-review

Abstract

Refixation probability during reading is lowest near the word center, suggestive of an optimal viewing position (OVP). Counter-intuitively, fixation durations are largest at the OVP, a result called the inverted optimal viewing position (IOVP) effect [Vitu, McConkie, Kerr, & O'Regan, (2001). Vision Research 41, 3513-3533]. Current models of eye-movement control in reading fail to reproduce the IOVP effect. We propose a simple mechanism for generating this effect based on error-correction of mislocated fixations due to saccadic errors, First, we propose an algorithm for estimating proportions of mislocated fixations from experimental data yielding a higher probability for mislocated fixations near word boundaries. Second, we assume that mislocated fixations trigger an immediate start of a new saccade program causing a decrease of associated durations. Thus, the IOVP effect could emerge as a result of a coupling between cognitive and oculomotor processes. (c) 2005 Elsevier Ltd. All rights reserved.

Original languageEnglish
Pages (from-to)2201-2217
Number of pages17
JournalVision Research
Volume45
Issue number17
DOIs
Publication statusPublished - Aug 2005

Keywords

  • reading
  • optimal viewing position
  • mislocated fixations
  • saccadic errors
  • EYE-MOVEMENT CONTROL
  • E-Z-READER
  • OPTIMAL LANDING POSITION
  • SACCADE GENERATION
  • ISOLATED WORDS
  • MODELS
  • FREQUENCY
  • LOCATIONS
  • LENGTH

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