Effectiveness of Eye-Gaze Input System-Identification of Conditions that Assure High Pointing Accuracy and Fast Pointing Velocity and Movement Directional Effect-

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  • MURATA Atsuo
    Graduate School of Natural Science and Technology, Okayama University
  • MIYAKE Takashi
    Graduate School of Natural Science and Technology, Okayama University
  • MORIWAKA Makoto
    Graduate School of Natural Science and Technology, Okayama University

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Other Title
  • 視線入力システムの有効性―ポイント精度・速度を保証する条件と移動方向の影響の同定―
  • シセン ニュウリョク システム ノ ユウコウセイ ポイント セイド ソクド オ ホショウ スル ジョウケン ト イドウ ホウコウ ノ エイキョウ ノ ドウテイ
  • —Identification of Conditions that Assure High Pointing Accuracy and Fast Pointing Velocity and Movement Directional Effect—
  • －ポイント精度・速度を保証する条件と移動方向の影響の同定－

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The aim of this study was to identify the condition under which high pointing accuracy and fast pointing velocity are assured when using an eye-gaze input system. It was also investigated how direction of eye movement affected the performance of an eye-gaze input system. Here, age, the arrangement of targets (vertical and horizontal), the size of a target, and the distance between adjacent targets were selected as experimental factors. The pointing accuracy of an eye-gaze input system was higher in the horizontal arrangement than in the vertical arrangement. The distance between targets of more than or equal to 20 pixels and the target size of 40 pixels were found to be desirable to attain higher accuracy for both vertical and horizontal arrangements. For both age groups and for both vertical and horizontal arrangements, the target size must be set as larger as possible to attain faster pointing velocity. The distance between targets had little effects on the pointing velocity. The difference of pointing velocity between a mouse and an eye-gaze input system was larger for older adults than for young adults. Thus, an eye-gaze input system was found to be effective especially for older adults. An eye-gaze input system might compensate for the declined motor functions of older adults. For both age groups, it tended that the pointing time for the lower direction was longer than that for other directions.

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