کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
9348640 | 1263611 | 2005 | 12 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Influence of target size and luminance on the White-TodoroviÄ effect
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کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
سیستم های حسی
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Influence of target size and luminance on the White-TodoroviÄ effect Influence of target size and luminance on the White-TodoroviÄ effect](/preview/png/9348640.png)
چکیده انگلیسی
Variants of a lightness effect described by [TodoroviÄ's, D. (1997). Lightness and junctions. Perception, 26, 379] were studied to quantify the failure of lightness constancy as a function of target luminance and target size. TodoroviÄ's effect is similar to White's effect. Simultaneous lightness contrast appears to operate selectively between stimuli belonging to the same perceptual group, and not between stimuli of equal proximity belonging to different perceptual groups. We found that mid-gray targets grouped with a white contextual stimulus were matched on average to a darker-than-veridical gray. Those grouped with a black contextual stimulus were matched on average veridically. This is consistent with 'anchoring' effects observed in simple two-stimulus displays. However, target luminance had an effect that was not captured by mid-level target luminance data or data averaged across target luminances. For both white and black contextual stimuli, light-gray targets were matched to a darker-than-veridical gray and the direction of this error shifted toward the lighter-than-veridical direction as the luminance of the target was lowered. The result was a constant difference between the perceived lightnesses of targets presented with white and black contextual stimuli. Target size had no effect on perceived lightness. These data imply that the TodoroviÄ-White effect can be characterized as lightness assimilation rather than as lightness contrast. By accounting for compression as well as the TodoroviÄ-White effect, assimilation is the more general explanation.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Vision Research - Volume 45, Issue 9, April 2005, Pages 1165-1176
Journal: Vision Research - Volume 45, Issue 9, April 2005, Pages 1165-1176
نویسندگان
Burak Güçlü, Bart Farell,