Steady-state misbinding of colour and motion

Wu, Daw‐An; Kanai, Ryota; Shimojo, Shinsuke

doi:10.1038/429262a

Cited by 67 publications

(92 citation statements)

References 5 publications

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“…The foveal superiority for feature binding we demonstrate in this study may be related to an interesting illusion by Wu et al (2004), where dot-by-dot pairing of color and motion in the periphery is misperceived in favor of a different pairing presented at the fovea. In the absence of foveal stimulation, peripheral perception reverts to veridical.…”

Section: Relations To Previous Literaturementioning

confidence: 59%

Spatial Resolution for Feature Binding Is Impaired in Peripheral and Amblyopic Vision

Neri

Levi²

2006

Journal of Neurophysiology

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Neri, Peter and Dennis M. Levi. Spatial resolution for feature binding is impaired in peripheral and amblyopic vision. J Neurophysiol 96: 142-153, 2006. First published January 18, 2006 doi:10.1152/jn.01261.2005. We measured spatial resolution for discriminating targets that differed from nearby distractors in either color or orientation or their conjunction. In the fovea of normal human observers, whenever both attributes are big enough to be individually visible, their conjunction is also visible. In the periphery, the two attributes may be visible, but their conjunction may be invisible. We found a similar impairment in resolving conjunctions for the fovea of deprived eyes of humans with abnormal visual development (amblyopia). These results are quantitatively explained by a model of primary visual cortex (V1) in which orientation and color maps are imperfectly co-registered topographically. Our results in persons with amblyopia indicate that the ability of the fovea to compensate for this poor co-registration is consolidated by visual experience during postnatal development. I N T R O D U C T I O NWe perceive individual objects as possessing multiple attributes: a red ball falls behind a brown fence. This perceptual representation combines four different attributes (color, shape, motion, and depth) and provides an example of feature binding (Treisman 1998).Feature binding can fail (Treisman 1996). When this occurs, normal observers experience illusory conjunctions of physically disjunct features (Treisman and Schmidt 1982;Wolfe and Cave 1999). The failure is chronic in patients with subcortical (Ward et al. 2002) but particularly cortical (Cohan and Rafal 1991) damage like visual neglect (Eglin et al. 1989;Estermann et al. 2000) and Balint's syndrome Robertson et al. 1997), and there is some evidence for impaired binding in schizophrenia (Alain et al. 2002). Our goal was to identify and measure aspects of the visual stimulus that lead to selective failure of feature binding in both normal and pathological vision.We focused on the ability to resolve small visual items. We chose this measure for two reasons. First, the assessment of resolution has a well-established history in visual psychophysics and can be easily related to the physiological concept of neuronal receptive fields (RFs) . Second, it pertains directly to a major issue and currently active debate in contemporary neuroscience: how the representation of space (and its resolution) "glues" together separate representations of object properties (Treisman 1998;Yu et al. 2005). We opted for a design that allowed us to factor out potential effects of crowding (Parkes et al. 2001), working memory (Luck and Vogel 1997), and coarse attentional deployment (Treisman 1998;Yu et al. 2005). We achieved this by normalizing the spatial resolution for binding features (orientation and color) by the resolution for discriminating features individually (orientation or color), in almost identical stimuli.We found that the resolution for binding features is much coarse...

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Section: Relations To Previous Literaturementioning

confidence: 59%

Spatial Resolution for Feature Binding Is Impaired in Peripheral and Amblyopic Vision

Neri

Levi²

2006

Journal of Neurophysiology

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“…These two sets of information could be independently integrated, with both sets of information being correlated with spatial information. The present study provides evidence from a variety of visual illusions, one of which was recently published [2].…”

Section: Introductionmentioning

confidence: 75%

“…This illusion results from local dot motions being spatially integrated to make two sheets of coherent motions for the whole scene, with the dot color information being associated with each sheet, on the basis of the information at the center of the image. The authors interpreted these findings as evidence for the existence of a binding problem [2].…”

Section: Introductionmentioning

confidence: 99%

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Spatial integration of visual motion with separate speed and direction information

Kaneoke

Kakigi

2006

NeuroReport

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We present evidence to support the possibility that motion information is divided into two scalars: direction and speed, to integrate local motions over a wide spatial range. With various motion stimuli composed of numerous red and green dots, observers perceived that peripheral dots moved similar to central dots on the basis of the same direction or speed, even when speed or direction was different. The results indicate that the direction and speed of local motion can be processed separately and that the distributions are analyzed independently to integrate the local motions. This process, based on two motion scalars, may be useful for the perception of complex motions that would be difficult to perceive with a process based on motion vectors.

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“…feature-conjunction analysis would be the misbinding illusion re ported in our previous studies (Noguchi, Shimojo, Kakigi, & Hoshiyama, 2011;Suzuki, Wolfe, Horowitz, & Noguchi, 2013;Wu, Kanai, & Shimojo, 2004). In this illusion, subjects view a stimulus array composed of four types of bars (red-horizontal, red-vertical, green-horizontal, and green-vertical) that are pro duced by a combination of two colors, red (R) and green (G), with two orientations, horizontal (H) and vertical (V; Figure 1).…”

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confidence: 97%

Unconscious analyses of visual scenes based on feature conjunctions.

Tachibana

Noguchi²

2015

Journal of Experimental Psychology: Human Perception and Perfor

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To efficiently process a cluttered scene, the visual system analyzes statistical properties or regularities of visual elements embedded in the scene. It is controversial, however, whether those scene analyses could also work for stimuli unconsciously perceived. Here we show that our brain performs the unconscious scene analyses not only using a single featural cue (e.g., orientation) but also based on conjunctions of multiple visual features (e.g., combinations of color and orientation information). Subjects foveally viewed a stimulus array (duration: 50 ms) where 4 types of bars (red-horizontal, red-vertical, green-horizontal, and green-vertical) were intermixed. Although a conscious perception of those bars was inhibited by a subsequent mask stimulus, the brain correctly analyzed the information about color, orientation, and color-orientation conjunctions of those invisible bars. The information of those features was then used for the unconscious configuration analysis (statistical processing) of the central bars, which induced a perceptual bias and illusory feature binding in visible stimuli at peripheral locations. While statistical analyses and feature binding are normally 2 key functions of the visual system to construct coherent percepts of visual scenes, our results show that a high-level analysis combining those 2 functions is correctly performed by unconscious computations in the brain.

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Steady-state misbinding of colour and motion

Cited by 67 publications

References 5 publications

Spatial Resolution for Feature Binding Is Impaired in Peripheral and Amblyopic Vision

Spatial Resolution for Feature Binding Is Impaired in Peripheral and Amblyopic Vision

Spatial integration of visual motion with separate speed and direction information

Unconscious analyses of visual scenes based on feature conjunctions.

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