Global factors generate the mccollough effect

Dodwell, P. C.; O’Shea, Robert P

doi:10.1016/0042-6989(87)90043-5

Cited by 27 publications

(25 citation statements)

References 26 publications

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“…Dodwell and his associates (Dodwell & O'Shea, 1987; have established color aftereffects using complex displays composed of a mixture of contour orientations. On the basis of this research, Dodwell and O'Shea (1987) concluded that "McColloughtype PCCAEs [pattern-contingent color aftereffects] are generated in a structure of the visual system somewhat above the level of strictly local operations, whether defined as edge and bar detectors or, equivalently, as units selectively tuned to different spatial frequencies and orientations" (p. 569).…”

Section: Discussionmentioning

confidence: 99%

Color aftereffect contingent on text

Allan

Siegel

Collins

et al. 1989

Perception & Psychophysics

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During adaptation, two different letter strings (each five or six letters) were presented to subjects alternately, one in green and the other in magenta. The extent to which these letter strings subsequently elicited a color aftereffect was assessed. In different experiments, the chromatic letter strings consisted of words and nonwords. The results indicated that letter strings that form English words can contingently elicit a color aftereffect. This was the case even when the words were anagrams. There was no evidence that nonword letter strings could contingently elicit such an aftereffect, even when the nonwords conformed to English orthography. The results are relevant to understanding other contingent color aftereffects

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Section: Discussionmentioning

confidence: 99%

Color aftereffect contingent on text

Allan

Siegel

Collins

et al. 1989

Perception & Psychophysics

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“…Although this line ofreasoning seems right-headed insofar as it supports concepts of recalibration and tuning that have been advanced by others (Dodwell & Humphrey, 1990;Held, 1980;Wolfe, 1990), its present formulation in terms ofobject constancy cannot be correct. A great deal of evidence from several laboratories supports the finding that forms that are locally orthogonal in orientation but globally completely unrelatable by the necessary kind of transformation do, nonetheless, produce (local) McCollough-like effects (e.g., Broerse & O'Shea, 1995;Dodwell & O'Shea, 1987;Dodwell & Humphrey, 1990;Emerson et aI., 1985;McCollough, 1994;Yasuda, 1978).…”

Section: An Associative Account?mentioning

confidence: 92%

Visual aftereffect of texture density contingent on color of frame

Durgin

1996

Perception & Psychophysics

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An aftereffect of perceived texture density contingent on the color of a surrounding region is reported. In a series of experiments, participants were adapted, with fixation, to stimuli in which the relative density of two achromatic texture regions was perfectly correlated with the color presented in a surrounding region. Following adaptation, the perceived relative density of the two regions was contingent on the color of the surrounding region or of the texture elements themselves. For example, if high density on the left was correlated with a blue surround during adaptation (and high density on the right with a yellow surround), then in order for the left and right textures to appear equal in the assessment phase, denser texture was required on the left in the presence of a blue surround (and denser texture on the right in the context of a yellow surround). Contingent aftereffects were found (1) with black-and-white scatter-dot textures, (2) with luminance-balanced textures, and (3) when the texture elements, rather than the surrounds, were colored during assessment. Effect size was decreased when the elements themselves were colored, but also when spatial subportions of the surround were used for the presentation of color. The effect may be mediated by retinal color spreading (Peppel, 1986)and appears consistent with a local associative account of contingent aftereffects, such as Barlow's (1990) model of modifIable inhibition.After adaptation to a dense texture localized in a specific region of the visual field, a visual aftereffect develops such that textures presented in that region will appear much less dense than when presented in another, nonadapted region (Anstis, 1974;Durgin & Proffitt, 1991). In the present paper I show that this aftereffect of texture density (not to be confused with spatial frequency) can be made contingent on color information presented in a spatially distinct (and otherwise untextured) region of the display. Previously, aftereffects both of motion (Potts & Harris, 1975) and ofcolor (Siegel, Allan, & Eissenberg, 1992) have been made contingent on information presented in a surrounding region orframe (color and texture in the former case and lightness in the latter). However, no framecontingent aftereffects have been reported in which the apparent spatial distribution ofluminance contrast is altered. Thus, the present study represents a unique demonstration of an aftereffect of spatial pattern contingent on information in the surround.It is often possible to make the perceptual distortion of one visual dimension contingent on the presence of another quite different dimension. For example, McCollough

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“…These conditions favor local factors by keeping the induction patterns in about the same position on the retina. In studies that have systematically varied fixation during induction with polar gratings (Broerse & O'Shea, 1995;Dodwell & O'Shea, 1987;Yasuda, 1978), the resulting CAEs have been reduced in magnitude but have not entirely disappeared. Further study may yet provide convincing evidence ofa role played by global factors, upholding the view of Dodwell and Humphrey (1990) that local orientation contingencies do not tell the whole story.…”

Section: Discussionmentioning

confidence: 99%

“…No such finding has been reported. Using the Emerson et al (1985) procedure, Dodwell and O'Shea (1987) required their observers to shift fixation in a systematic way during successive inductions with two grating pairs (Figures Ia and Ib), and evidence of both polar and Cartesian CAEs was still obtained. However, Broerse and O'Shea (1995) have argued that the pattern of fixation shifts did not rule out an explanation in terms oflocalline orientation.…”

Section: Discussionmentioning

confidence: 99%

Do McCollough effects provide evidence for global pattern processing?

McCollough¹

2000

Perception & Psychophysics

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Global factors generate the mccollough effect

Cited by 27 publications

References 26 publications

Color aftereffect contingent on text

Color aftereffect contingent on text

Visual aftereffect of texture density contingent on color of frame

Do McCollough effects provide evidence for global pattern processing?

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