Inefficient visual search for second-order motion

被引:35
作者
Ashida, H [1 ]
Seiffert, AE
Osaka, N
机构
[1] Kyoto Univ, Grad Sch Letters, Dept Psychol, Kyoto 6068501, Japan
[2] Ritsumeikan Univ, Coll Letters, Kita Ku, Kyoto 6038577, Japan
[3] Harvard Univ, Dept Psychol, Cambridge, MA 02138 USA
来源
JOURNAL OF THE OPTICAL SOCIETY OF AMERICA A-OPTICS IMAGE SCIENCE AND VISION | 2001年 / 18卷 / 09期
关键词
D O I
10.1364/JOSAA.18.002255
中图分类号
O43 [光学];
学科分类号
070207 ; 0803 ;
摘要
Visual search rate was used to assess attentional resources required for detection of opposing motions defined either by luminance or by modulations of texture contrast, flicker, or size. Though luminance-based targets were detected quickly, search through second-order motion was slow. Control experiments ruled out stimuli visibility, complexity, eccentricity sensitivity, and attributes of the carrier as possible accounts. Results suggest separate processing of the two types of stimuli: Luminance-based motion is detected by spatiotemporal filters, whereas second-order motion is likely processed by a capacity-limited, later stage. Rate-reducing effects of increased contrast and speed mirrored previous research suggesting that effortful feature tracking may be the mechanism. (C) 2001 Optical Society of America.
引用
收藏
页码:2255 / 2266
页数:12
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