On the structure of measurement noise in eye-tracking

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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 variability. 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
JournalJournal of Eye Movement Research
Issue number4
Pages (from-to)1-10
Number of pages10
Publication statusPublished - 04.09.2012
Externally publishedYes

Bibliographical note

National Science Foundation: BCS #0642716, BCS #0843133, DHB #0728743

    Research areas

  • Psychology - Data averaging, Eye-tracking, Fractal structure, Measurement noise