On the structure of measurement noise in eye-tracking

Charles A. Coey, Sebastian Wallot, Michael J. Richardson, Guy Van Orden

Research output: Contribution to journalArticlepeer-review

29 Citations (Scopus)
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Past research has discovered fractal structure in eye movement variability and interpreted this result as having theoretical ramifications. No research has, however, investigated how properties of the eye-tracking instrument might affect the structure of measurement varia-bility. The current experiment employed fractal and multifractal methods to investigate whether an eye-tracker produced intrinsic random variation and how features of the data recording procedure affected the structure measurement variability. The results of this experiment revealed that the structure of variation from a fake eye was indeed random and uncorrelated in contrast to the fractal structure from a fixated, real human eye. Moreover, the results demonstrated that data-averaging generally changes the structure of variation, introducing spurious structure into eye movement variability.
Original languageEnglish
Article number5
Pages (from-to)1-10
Number of pages10
JournalJournal of Eye Movement Research
Issue number4
Publication statusPublished - 2012
Externally publishedYes

Bibliographical note

Copyright the Author(s) 2012. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


  • eye-tracking
  • measurement noise
  • fractal structure
  • data averaging


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