2018 Fiscal Year Research-status Report
Generating artificial eye movements on a document for an objective readability measurement
| Project/Area Number |
17K00276
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| Research Institution | Osaka Prefecture University |
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Principal Investigator |
デンゲル アンドレアス 大阪府立大学, 研究推進機構, 客員教授 (00773574)
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| Co-Investigator(Kenkyū-buntansha) |
石丸 翔也 大阪府立大学, 研究推進機構, 客員研究員 (10788730)
黄瀬 浩一 大阪府立大学, 工学(系)研究科(研究院), 教授 (80224939)
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| Project Period (FY) |
2017-04-01 – 2020-03-31
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| Keywords | eye tracking / readability / legibility / fixation |
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| Outline of Annual Research Achievements |
In this research, we aim to evaluate the readability of a document on the basis of eye movements. Since it is not realistic to ask participants to read documents with eye tracking devices every time, we develop a system which synthesizes artificial eye movements on the document and utilizes them for the readability measurement.
As mentioned in the progress report of the last year, we focused on a fixation analysis in FY 2018. We proposed a method to estimate fixation durations of each word of a document without asking people to read the document with an eye tracker. We investigated the importance of word length as a feature on the assumption that an increase in word length and complexity would rather increase the fixation duration. In addition, the scope of word vectors (pre-trained word2vec model) from the dataset vocabulary was also utilized to determine the effects in fixation durations of the words. On a dataset including 19 participants reading five documents, we achieved to predict fixation durations on each word with the coefficient of determination R2 score 0.47.
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| Current Status of Research Progress |
Current Status of Research Progress
2: Research has progressed on the whole more than it was originally planned.
Reason
The main part of the research plan for FY 2017 is to generate artificial fixation durations on unknown documents. As listed above, we proposed a fixation duration estimation method and reported preliminary results. In addition, we conducted a preliminary experiment aiming to assessing the readability score of a document which is scheduled in FY2019. One Master student finished writing his thesis on this project. By considering them, we may state that we reached our goals.
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| Strategy for Future Research Activity |
We are going to involve saccades to cover regressions (re-reading on a document) and skimming. Then, we combine approaches for fixation/saccade estimation to synthesize realistic eye movements. We will develop demo applications, evaluate the performance, and improve the system if we still have more time to investigate.
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| Causes of Carryover |
We originally assigned traveling costs for presenting our work at a conference. But the conference we participated in FY 2018 was held at our working place and we could save the traveling cost.
From the results of our experiments, we found that more precise eye tracking devices are required to investigate saccades while reading. We will buy and test novel devices by using the money saved in FY 2018. The number of sensing and processing devices may also be increased for a large-scale study depending on the remaining budget.
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Research Products
(1 results)
