The effect of fixational eye movements on fixation identification with a dispersion-based fixation detection algorithm
Gaze data of 31 participants of a memory recall experiment was analyzed and the I-DT dispersion based algorithm of Salvucci and Goldberg (2000) was used to identify fixations. It was found that individuals differ considerably with regard to the stability of eye gaze and that fixational eye movements...
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| Format: | Article |
| Language: | English |
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MDPI AG
2009-04-01
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| Series: | Journal of Eye Movement Research |
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| Online Access: | https://bop.unibe.ch/JEMR/article/view/2283 |
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| _version_ | 1849324679743930368 |
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| author | Pieter Blignaut Tanya Beelders |
| author_facet | Pieter Blignaut Tanya Beelders |
| author_sort | Pieter Blignaut |
| collection | DOAJ |
| description | Gaze data of 31 participants of a memory recall experiment was analyzed and the I-DT dispersion based algorithm of Salvucci and Goldberg (2000) was used to identify fixations. It was found that individuals differ considerably with regard to the stability of eye gaze and that fixational eye movements affect the accuracy of fixation identification and the optimum dispersion threshold. It was also found that fixation radius and the distance between the points in a fixation that are the furthest apart are the most reliable metrics for a dispersion-based fixation identification algorithm. Finally, it is argued that the correct setting of dispersion threshold is of utmost importance, especially if the participants are not homogeneous with regard to gaze stability. |
| format | Article |
| id | doaj-art-33b45d2f45604ab2bfb04e7e172366b1 |
| institution | Kabale University |
| issn | 1995-8692 |
| language | English |
| publishDate | 2009-04-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Eye Movement Research |
| spelling | doaj-art-33b45d2f45604ab2bfb04e7e172366b12025-08-20T03:48:37ZengMDPI AGJournal of Eye Movement Research1995-86922009-04-012510.16910/jemr.2.5.4The effect of fixational eye movements on fixation identification with a dispersion-based fixation detection algorithmPieter Blignaut0Tanya Beelders1University of the Free StateUniversity of the Free StateGaze data of 31 participants of a memory recall experiment was analyzed and the I-DT dispersion based algorithm of Salvucci and Goldberg (2000) was used to identify fixations. It was found that individuals differ considerably with regard to the stability of eye gaze and that fixational eye movements affect the accuracy of fixation identification and the optimum dispersion threshold. It was also found that fixation radius and the distance between the points in a fixation that are the furthest apart are the most reliable metrics for a dispersion-based fixation identification algorithm. Finally, it is argued that the correct setting of dispersion threshold is of utmost importance, especially if the participants are not homogeneous with regard to gaze stability.https://bop.unibe.ch/JEMR/article/view/2283eye-trackingfixation identificationfixational eye movements |
| spellingShingle | Pieter Blignaut Tanya Beelders The effect of fixational eye movements on fixation identification with a dispersion-based fixation detection algorithm Journal of Eye Movement Research eye-tracking fixation identification fixational eye movements |
| title | The effect of fixational eye movements on fixation identification with a dispersion-based fixation detection algorithm |
| title_full | The effect of fixational eye movements on fixation identification with a dispersion-based fixation detection algorithm |
| title_fullStr | The effect of fixational eye movements on fixation identification with a dispersion-based fixation detection algorithm |
| title_full_unstemmed | The effect of fixational eye movements on fixation identification with a dispersion-based fixation detection algorithm |
| title_short | The effect of fixational eye movements on fixation identification with a dispersion-based fixation detection algorithm |
| title_sort | effect of fixational eye movements on fixation identification with a dispersion based fixation detection algorithm |
| topic | eye-tracking fixation identification fixational eye movements |
| url | https://bop.unibe.ch/JEMR/article/view/2283 |
| work_keys_str_mv | AT pieterblignaut theeffectoffixationaleyemovementsonfixationidentificationwithadispersionbasedfixationdetectionalgorithm AT tanyabeelders theeffectoffixationaleyemovementsonfixationidentificationwithadispersionbasedfixationdetectionalgorithm AT pieterblignaut effectoffixationaleyemovementsonfixationidentificationwithadispersionbasedfixationdetectionalgorithm AT tanyabeelders effectoffixationaleyemovementsonfixationidentificationwithadispersionbasedfixationdetectionalgorithm |