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Detection of fixations and smooth pursuit movements in high-speed eye-tracking data

Larsson, Linnéa LU ; Nyström, Marcus LU orcid ; Andersson, Richard LU and Stridh, Martin LU (2015) In Biomedical Signal Processing and Control 18. p.145-152
Abstract
A novel algorithm for the detection of fixations and smooth pursuit movements in high-speed eye-tracking data is proposed, which uses a three-stage procedure to divide the intersaccadic intervals intoa sequence of fixation and smooth pursuit events. The first stage performs a preliminary segmentationwhile the latter two stages evaluate the characteristics of each such segment and reorganize the pre-liminary segments into fixations and smooth pursuit events. Five different performance measures arecalculated to investigate different aspects of the algorithm’s behavior. The algorithm is compared to thecurrent state-of-the-art (I-VDT and the algorithm in [11]), as well as to annotations by two experts. Theproposed algorithm performs... (More)
A novel algorithm for the detection of fixations and smooth pursuit movements in high-speed eye-tracking data is proposed, which uses a three-stage procedure to divide the intersaccadic intervals intoa sequence of fixation and smooth pursuit events. The first stage performs a preliminary segmentationwhile the latter two stages evaluate the characteristics of each such segment and reorganize the pre-liminary segments into fixations and smooth pursuit events. Five different performance measures arecalculated to investigate different aspects of the algorithm’s behavior. The algorithm is compared to thecurrent state-of-the-art (I-VDT and the algorithm in [11]), as well as to annotations by two experts. Theproposed algorithm performs considerably better (average Cohen’s kappa 0.42) than the I-VDT algorithm(average Cohen’s kappa 0.20) and the algorithm in [11] (average Cohen’s kappa 0.16), when comparedto the experts’ annotations. (Less)
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author
; ; and
organization
publishing date
type
Contribution to journal
publication status
published
subject
keywords
smooth pursuit, eye-tracking, Signal processing
in
Biomedical Signal Processing and Control
volume
18
pages
145 - 152
publisher
Elsevier
external identifiers
  • wos:000354150400018
  • scopus:84921693206
ISSN
1746-8094
DOI
10.1016/j.bspc.2014.12.008
language
English
LU publication?
yes
id
6587326f-96da-4b17-a279-59bb4656c873 (old id 4941066)
date added to LUP
2016-04-01 14:23:12
date last changed
2023-01-04 04:15:18
@article{6587326f-96da-4b17-a279-59bb4656c873,
  abstract     = {{A novel algorithm for the detection of fixations and smooth pursuit movements in high-speed eye-tracking data is proposed, which uses a three-stage procedure to divide the intersaccadic intervals intoa sequence of fixation and smooth pursuit events. The first stage performs a preliminary segmentationwhile the latter two stages evaluate the characteristics of each such segment and reorganize the pre-liminary segments into fixations and smooth pursuit events. Five different performance measures arecalculated to investigate different aspects of the algorithm’s behavior. The algorithm is compared to thecurrent state-of-the-art (I-VDT and the algorithm in [11]), as well as to annotations by two experts. Theproposed algorithm performs considerably better (average Cohen’s kappa 0.42) than the I-VDT algorithm(average Cohen’s kappa 0.20) and the algorithm in [11] (average Cohen’s kappa 0.16), when comparedto the experts’ annotations.}},
  author       = {{Larsson, Linnéa and Nyström, Marcus and Andersson, Richard and Stridh, Martin}},
  issn         = {{1746-8094}},
  keywords     = {{smooth pursuit; eye-tracking; Signal processing}},
  language     = {{eng}},
  pages        = {{145--152}},
  publisher    = {{Elsevier}},
  series       = {{Biomedical Signal Processing and Control}},
  title        = {{Detection of fixations and smooth pursuit movements in high-speed eye-tracking data}},
  url          = {{http://dx.doi.org/10.1016/j.bspc.2014.12.008}},
  doi          = {{10.1016/j.bspc.2014.12.008}},
  volume       = {{18}},
  year         = {{2015}},
}