The Ebbinghaus illusion in contrast-defined and orientation-defined stimuli

Лаврентьева, Софья Всеволодовна; Murakami, Ikuya

doi:10.1016/j.visres.2018.04.006

Cited by 7 publications

(4 citation statements)

References 45 publications

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“…Our results accord with a recent study by Lavrenteva and Murakami (2018). In their study, the target and flankers were defined by first-and second-order attributes (e.g., luminance and local contrast, respectively).…”

Section: Discussionsupporting

confidence: 92%

Perceptual grouping leads to objecthood effects in the Ebbinghaus illusion

2020

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The Ebbinghaus illusion is argued to be a product of low-level contour interactions or a higher cognitive comparison process. We examined the effect of grouping on the illusion by manipulating objecthood, i.e., the degree to which an object is a cohesive perceptual entity. We hypothesized that reduced objecthood would decrease the illusion magnitude, because the objects become less efficient in the comparison process. To test this hypothesis, we used a version of the illusion where the target and flanking objects were squares that were composed from their corners or sides. Degree of objecthood was manipulated by changing the gap size or rotation angle of the elements constructing the objects, so that larger gaps and angles produced less cohesive objects than smaller. Participants performed an adjustment procedure on the test target to match a control target in size. In addition, subjective reports of the objects' shape were collected as a measure of perceived shape. Our results show decreased illusion magnitude with increasing gap size and rotation angle. Surprisingly, the perceived shape of the objects did not correlate with illusion magnitude. These results provide novel evidence of the role of mid-level processes in the Ebbinghaus illusion and point to a dissociation between subjective and objective measures of objecthood.

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Section: Discussionsupporting

confidence: 92%

Perceptual grouping leads to objecthood effects in the Ebbinghaus illusion

2020

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“…1901). Similar effects have been found for contrast and luminance (Lavrenteva and Murakami 2018;White 1981), orientation (Gibson 1937;Lavrenteva and Murakami 2018) and motion. These contextual effects on low-level visual features have been suggested to aid the perception of textures and scenes (Whitney and Yamanashi Leib 2018).…”

Section: Introductionsupporting

confidence: 83%

Contextual and own-age effects in age perception

Pilz

Liang

2022

Exp Brain Res

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Our judgement of certain facial characteristics such as emotion, attractiveness or age, is affected by context. Faces that are flanked by younger faces, for example, are perceived as being younger, whereas faces flanked by older faces are perceived as being older. Here, we investigated whether contextual effects in age perception are moderated by own age effects. On each trial, a target face was presented on the screen, which was flanked by two faces. Flanker faces were either identical to the target face, were 10 years younger or 10 years older than the target face. We asked 40 older (64–69 years) and 43 younger adults (24–29) to estimate the age of the target face. Our results replicated previous studies and showed that context affects age estimation of faces flanked by target faces of different ages. These context effects were more pronounced for younger compared to older flankers but present across both tested age groups. An own-age advantage was observed for older adults for unflanked faces who had larger estimation errors for younger faces compared to older faces and younger adults. Flanker effects, however, were not moderated by own-age effects. It is likely that the increased effect of younger flankers is due to mechanisms related to perceptual averaging.

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“…Surprisingly, the central circle surrounded by larger circle appears smaller, whereas the central circle surrounded by smaller circles appears larger (Ebbinghaus, 1902;Titchener, 1901). Similar effects have been found for contrast and luminance (Lavrenteva & Murakami, 2018;White, 1981), orientation (Gibson, 1937;Lavrenteva & Murakami, 2018) and motion. These contextual effects on low-level visual features have been suggested to aid the perception of textures and scenes (Whitney & Yamanashi Leib, 2018).…”

Section: Introductionsupporting

confidence: 83%

Contextual effects in age perception and the own-age bias

Pilz¹

2021

Preprint

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Our judgement of certain facial characteristics such as emotion, attractiveness or age, is affected by context. Faces that are flanked by younger faces, for example, are perceived as being younger, whereas faces flanked by older faces are perceived as being older. Here, we investigated whether contextual effects in age perception are mediated by an own age bias. On each trial, a target face was presented on the screen, which was flanked by two faces. Flanker faces were either identical to the target face, were 10 years younger or 10 years older than the target face. We asked forty older (64-69 years) and forty-three younger adults (24-29) to estimate the age of the target face.Our results replicate previous studies and showed that context affects age estimation of faces flanked by target faces of different ages. These context effects were more pronounced for younger compared to older flankers but present across both tested age groups. An own-age bias was observed for unflanked faces such that older adults had larger estimation errors for younger faces compared to older faces and younger adults. Flanker effects, however, were not mediated by an own-age bias. It is likely that the increased effect of younger flankers is due to mechanisms related to perceptual averaging.

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The Ebbinghaus illusion in contrast-defined and orientation-defined stimuli

Cited by 7 publications

References 45 publications

Perceptual grouping leads to objecthood effects in the Ebbinghaus illusion

Perceptual grouping leads to objecthood effects in the Ebbinghaus illusion

Contextual and own-age effects in age perception

Contextual effects in age perception and the own-age bias

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