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[Abstract] Recent studies show that the mechanism responsible for the occurrence of microsaccades, which are small involuntary shifts in the eye-gaze position, is related to the visual attention system. Some of these studies show that the microsaccade rate increases with attention shift. In contrast, the other studies indicate that the occurrence of microsaccades is inhibited when visual attention is focused around a fixed target. It has not yet been established as to which of these conclusions is correct. In this study, we hypothesized that the microsaccade rate decreases with focal attention and carried out experiments to control the focus of subjects\u0027 attention when they were maintaining their fixation. Using a rapid serial visual presentation (RSVP) paradigm, we displayed alphabets at the center of a CRT display. Subjects were instructed to detect randomly displayed blackish letters from among the gray letters on the screen. 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〈Original Papers〉視覚的注意の集中がもたらすマイクロサッカードの抑制効果
https://kindai.repo.nii.ac.jp/records/5752
https://kindai.repo.nii.ac.jp/records/5752fed2846c-04bf-4439-ac91-90364ca00a2b
名前 / ファイル | ライセンス | アクション |
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AA11153712-20120331-0007.pdf (3.1 MB)
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Item type | ☆紀要論文 / Departmental Bulletin Paper(1) | |||||
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公開日 | 2012-04-16 | |||||
タイトル | ||||||
タイトル | 〈Original Papers〉視覚的注意の集中がもたらすマイクロサッカードの抑制効果 | |||||
タイトル | ||||||
言語 | en | |||||
タイトル | 〈Original Papers〉Inhibition of microsaccade rate caused by focus of visual attention | |||||
著者 |
遠藤, 翔
× 遠藤, 翔× 小濱, 剛 |
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言語 | ||||||
言語 | jpn | |||||
資源タイプ | ||||||
資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
資源タイプ | departmental bulletin paper | |||||
著者(英) | ||||||
en | ||||||
Endo, Sho | ||||||
著者(英) | ||||||
en | ||||||
Kohama, Takeshi | ||||||
著者 所属 | ||||||
近畿大学大学院生物理工学研究科電子システム情報工学専攻 | ||||||
著者 所属 | ||||||
近畿大学生物理工学部システム生命科学科 | ||||||
著者所属(翻訳) | ||||||
Graduate School of Biology—Oriented Science and Technology, Kinki University | ||||||
著者所属(翻訳) | ||||||
Department of Computational Systems Biology, Kinki University | ||||||
版 | ||||||
出版タイプ | VoR | |||||
出版タイプResource | http://purl.org/coar/version/c_970fb48d4fbd8a85 | |||||
出版者 名前 | ||||||
出版者 | 近畿大学生物理工学部 | |||||
書誌情報 |
Memoirs of the Faculty of Biology-Oriented Science and Technology of Kinki University en : 近畿大学 生物理工学部 紀要 号 29, p. 7-15, 発行日 2012-03-01 |
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ISSN | ||||||
収録物識別子タイプ | ISSN | |||||
収録物識別子 | 13427202 | |||||
抄録 | ||||||
内容記述タイプ | Abstract | |||||
内容記述 | [要旨] 注視時に不随意に発生するマイクロサッカードの発生機序と, 視覚的注意機構との関与を示す報告が相次いでいる. 先行研究の多くは, 注意の移動に伴ってマイクロサッカード発生頻度が増加することを指摘しているが, 一方では, 注意の集中によってマイクロサッカード発生頻度が低下する可能性を示唆する報告もあり, いずれの見解が妥当であるのか結論は得られていない. そこで本研究では, 注意の集中によりマイクロサッカードの発生頻度が減少することを仮定し, 注視を維持した状態で注意の集中度を制御する実験を行い, このときのマイクロサッカードの発生頻度について解析を行った. 実験課題は, モニタ中央に連続的に表示される英字を妨害刺激とし, ランダムなタイミングで表示される明るさの異なる英字を目標刺激として読み取るものであり, 輝度コントラストが高い場合をHigh Contrast 条件 (HC), 低い場合をLow Contrast 条件(LC), 文字の読み取りを課さない場合をControl条件とした. これら3つの条件で注意の集中度をコントロールし, このときの眼球運動を計測してマイクロサッカード発生頻度の解析を行った. 注意の集中度合いを検証するため, 文字の読み取りと同時に, 周辺視野に配置した低い空間周波数のガボールパッチを一定速度で左右いずれかに回転運動させ, 回転方向の検出を課した. 実験の結果, LC条件においてマイクロサッカードの発生が抑制される傾向が示され, ガボールパッチの検出率から, この条件において注意がより集中されていたことが確認された. このことから, 注意の集中によりマイクロサッカードが抑制されることが示唆された. [Abstract] Recent studies show that the mechanism responsible for the occurrence of microsaccades, which are small involuntary shifts in the eye-gaze position, is related to the visual attention system. Some of these studies show that the microsaccade rate increases with attention shift. In contrast, the other studies indicate that the occurrence of microsaccades is inhibited when visual attention is focused around a fixed target. It has not yet been established as to which of these conclusions is correct. In this study, we hypothesized that the microsaccade rate decreases with focal attention and carried out experiments to control the focus of subjects' attention when they were maintaining their fixation. Using a rapid serial visual presentation (RSVP) paradigm, we displayed alphabets at the center of a CRT display. Subjects were instructed to detect randomly displayed blackish letters from among the gray letters on the screen. The contrast between the target and distractor letters was adjusted to either high contrast (HC task) or low contrast (LC task) in order to control the degree of focal attention. As a control, no target letters were displayed (Control task). While subjects were pursuing these tasks, their fixation eye movements were measured. To verify the degree of focal attention, we tested the subjects on a rotation direction detection task; this task involved the detection of a low-spatial-frequency Gabor patch that rotated clockwise or counterclockwise at a uniform speed in the subject's peripheral vision. The results indicate that microsaccade rate was more inhibited in the LC tasks. The results of the Gabor-patch rotation detection show that the subjects' visual attention was more intense around the fovea in the LC tasks than in the HC tasks. These results suggest that the microsaccade rate varies with the degree of focal attention around the foveal region. | |||||
フォーマット | ||||||
内容記述タイプ | Other | |||||
内容記述 | application/pdf |