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  • Falkmer, Torbjörn, et al. (author)
  • Fixation identification in centroid versus start-point modes using eye-tracking data
  • 2008
  • In: Perceptual and Motor Skills. - : Sage Publications. - 0031-5125 .- 1558-688X. ; 106:3, s. 710-724
  • Journal article (peer-reviewed)abstract
    • Fixation-identification algorithms, needed for analyses of eye movements, may typically be separated into three categories, viz. (i) velocity-based algorithms, (ii) area-based algorithms, and (iii) dispersion-based algorithms. Dispersion-based algorithms are commonly used but this application introduces some difficulties, one being optimization. Basically, there are two modes to reach this goal of optimization, viz., the start-point mode and the centroid mode. The aim of the present study was to compare and evaluate these two dispersion-based algorithms. Manual inspections were made of 1,400 fixations in each mode. Odds ratios showed that by using the centroid mode for fixation detection, a valid fixation is 2.86 times more likely to be identified than by using the start-point mode. Moreover, the algorithm based on centroid mode dispersion showed a good interpretation speed, accuracy, robustness, and ease of implementation, as well as adequate parameter settings.
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  • Result 1-1 of 1
Type of publication
journal article (1)
Type of content
peer-reviewed (1)
Author/Editor
Falkmer, Torbjörn (1)
Dukic, Tania (1)
Bjällmark, Anna (1)
Larsson, Matilda (1)
Dahlman, Joakim (1)
University
Royal Institute of Technology (1)
Linköping University (1)
Jönköping University (1)
Language
English (1)
Research subject (UKÄ/SCB)
Engineering and Technology (1)
Social Sciences (1)
Year
2008 (1)Undo refine

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