Dynamic programming for re-mapping noisy fixations in translation tasks
Eyetrackers which allow for free head movements are in many cases imprecise to the extent that reading patterns become heavily distorted. The poor usability and interpretability of these gaze patterns is corroborated by a "naïve" fixation-to-symbol mapping, which often wrongly maps the pos...
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MDPI AG
2013-08-01
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| Series: | Journal of Eye Movement Research |
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| Online Access: | https://bop.unibe.ch/JEMR/article/view/2358 |
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| _version_ | 1850173112745721856 |
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| author | Michael Carl |
| author_facet | Michael Carl |
| author_sort | Michael Carl |
| collection | DOAJ |
| description | Eyetrackers which allow for free head movements are in many cases imprecise to the extent that reading patterns become heavily distorted. The poor usability and interpretability of these gaze patterns is corroborated by a "naïve" fixation-to-symbol mapping, which often wrongly maps the possibly drifted center of the observed fixation onto the symbol directly below it. In this paper I extend this naïve fixation-to-symbol mapping by introducing background knowledge about the translation task. In a first step, the sequence of fixation-to-symbol mappings is extended into a lattice of several possible fixated symbols, including those on the line above and below the naïve fixation mapping. In a second step a dynamic programming algorithm applies a number of heuristics to find the best path through the lattice, based on the probable distance in characters, in words and in pixels between successive fixations and the symbol locations, so as to smooth the gazing path according to the background gazing model. A qualitative and quantitative evaluation shows that the algorithm increases the accuracy of the re-mapped symbol sequence. |
| format | Article |
| id | doaj-art-d181ca5b80094bf3b2c4f3fde3623361 |
| institution | OA Journals |
| issn | 1995-8692 |
| language | English |
| publishDate | 2013-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Journal of Eye Movement Research |
| spelling | doaj-art-d181ca5b80094bf3b2c4f3fde36233612025-08-20T02:19:55ZengMDPI AGJournal of Eye Movement Research1995-86922013-08-016210.16910/jemr.6.2.5Dynamic programming for re-mapping noisy fixations in translation tasksMichael Carl0Copenhagen Business SchoolEyetrackers which allow for free head movements are in many cases imprecise to the extent that reading patterns become heavily distorted. The poor usability and interpretability of these gaze patterns is corroborated by a "naïve" fixation-to-symbol mapping, which often wrongly maps the possibly drifted center of the observed fixation onto the symbol directly below it. In this paper I extend this naïve fixation-to-symbol mapping by introducing background knowledge about the translation task. In a first step, the sequence of fixation-to-symbol mappings is extended into a lattice of several possible fixated symbols, including those on the line above and below the naïve fixation mapping. In a second step a dynamic programming algorithm applies a number of heuristics to find the best path through the lattice, based on the probable distance in characters, in words and in pixels between successive fixations and the symbol locations, so as to smooth the gazing path according to the background gazing model. A qualitative and quantitative evaluation shows that the algorithm increases the accuracy of the re-mapped symbol sequence.https://bop.unibe.ch/JEMR/article/view/2358fixation-to-symbol mappingdrift in gaze datadrift-correction algorithm |
| spellingShingle | Michael Carl Dynamic programming for re-mapping noisy fixations in translation tasks Journal of Eye Movement Research fixation-to-symbol mapping drift in gaze data drift-correction algorithm |
| title | Dynamic programming for re-mapping noisy fixations in translation tasks |
| title_full | Dynamic programming for re-mapping noisy fixations in translation tasks |
| title_fullStr | Dynamic programming for re-mapping noisy fixations in translation tasks |
| title_full_unstemmed | Dynamic programming for re-mapping noisy fixations in translation tasks |
| title_short | Dynamic programming for re-mapping noisy fixations in translation tasks |
| title_sort | dynamic programming for re mapping noisy fixations in translation tasks |
| topic | fixation-to-symbol mapping drift in gaze data drift-correction algorithm |
| url | https://bop.unibe.ch/JEMR/article/view/2358 |
| work_keys_str_mv | AT michaelcarl dynamicprogrammingforremappingnoisyfixationsintranslationtasks |