Occurrence and Function of Very Short Fixation Durations in Reading

  • Ralph Radach
  • Dieter Heller
  • Albrecht Inhoff
Chapter

Abstract

Fixation durations during reading range from less than 50 ms to more than 1 second with means in the order of 220 ms to 250 ms and standard deviations of approximately 80 ms to 100 ms. An interesting property of frequency distributions of fixation duration is the gradual increase in the relative frequencies up to approximately 140 ms followed by a much steeper increase for longer fixation durations until the modal fixation duration interval is reached. According to McConkie et al. (1994), this change in the slope of frequency distributions is of functional significance: The duration of fixations of 140 ms or less is determined by information obtained during the pior fixation, the duration of longer fixations is controlled ‘on line’, by properties of fixated text so that departing saccades can be “directly controlled”.

Keywords

Fixation Duration Corrective Saccade Express Saccade Scene Perception Short Fixation 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 1999

Authors and Affiliations

  • Ralph Radach
    • 1
  • Dieter Heller
    • 1
  • Albrecht Inhoff
    • 2
  1. 1.Institute of PsychologyTechnical University of AachenAachenGermany
  2. 2.University CenterState University of New York at BinghamtonBinghamtonUSA

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