Effect on visual search by the artificial visual field constriction

[Speaker] Saito, Ryotaro:1
[Co-author] Ikeda, Yoshifumi:2, Okuzumi, Hideyuki:1, Kokubun, Mitsuru:1, Kobayashi, Iwao:1
1:Tokyo Gakugei University (Japan), 2:Joetsu University of Education (Japan)

Cancellation task is a visual search task requiring rapid and accurate placement of a mark through each occurrence of a specific target displayed in an array of distractors on a sheet of paper. This study of 30 university students was conducted to examine the effects of visual field constriction in the cancellation task. Participants were administered the cancellation task while this visual fields were unrestricted, or restricted to 5°, 10°, or 15° by tunnel vision simulation goggles. The number of errors, time to completion, and the performance score as an index of cancelling efficiency were calculated. Results showed that the time to completion and the performance score were significantly greater in the narrowest visual field condition than in other visual field. This result suggest that the visual search efficiency was degraded when the visual field was restricted to be less than 5° in the cancellation task.
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