色・輝度情報による運動の検出

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概要

• 論文の詳細を見る

• Conventional view of motion detection is that luminance-based motion is processed in early stage of visual system, and colour-based motion is not processed in early stage but higher stages of visual system (Livingstone and Hubel, 1987). However, recent studies suggest that both colour-based motion and luminance-based motion are processed in early stage of visual system (Cropper and Derrington, 1996; Metha and Mullen, 1997). In contrast, result of visual search task showed that luminance-based motion was processed "pre-attentively" but colour-based motion was not (Luschow and Nothdurft, 1993). This result represents that colour-based motion is not processed in early stage of visual system. The aim of this study was to examine whether colour-based motion and luminance-based motion are processed separately and whether they are processed pre-attentively in early stage of visual system, using visual search task. Stimuli were square grating patches having different colour and luminance contrast. Target moved at 14deg/sec and presented for 50msec. Distractors were static grating patch with same contrast and spatial frequency as target. In results, numbers of stimuli affected only colour-based motion for response time, although it affected both colour-and luminance-based motion for rate of correct response. Contrast of grating also affected both colour-and luminance-based motion, except for response time of luminance-based motion. These results suggest that colour-based motion is not processed preattentively as Luschow and Nothdurft (1993) showed, and contrast sensitivity of colour-based motion is lower than that of luminance-based motion.

• 駒澤大学の論文

著者

• 永田 陽子

  駒澤大学文学部

• 佐藤 理晴

  駒澤大学大学院心理学専攻博士課程

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