Stereo viewing modulates three-dimensional shape processing during object recognition: A high-density ERP study.

Oliver, Zoe J.; Cristino, Filipe; Roberts, Mark; Pegna, Alan J.; Leek, E. Charles

doi:10.1037/xhp0000444

Cited by 8 publications

(10 citation statements)

References 68 publications

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“…A stereo-display advantage has also been reported by Cristino, Davitt, Hayward, and Leek (2015; see also Oliver, Cristino, Roberts, Pegna, & Leek, 2018) using objects made of an assembly of geon-like elements, but only when the objects to be matched are shown from markedly different viewpoints. A study by Lee and Saunders (2011) has shown that stereo reduces the cost of depth rotation, but also improves shape discrimination even when rich monocular shape cues are available.…”

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confidence: 59%

A surface-based code contributes to visual shape perception

et al. 2019

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Considerable uncertainty remains regarding the types of features human vision uses for shape representation. Visual-search experiments are reported which assessed the hypothesis of a surface-based (i.e., edge-bounded polygons) code for shape representation in human vision. The results indicate slower search rates and/or longer response times when the target shape shares its constituent surfaces with distractors (conjunction condition) than when the target surfaces are unique in the display (nonconjunction condition). This demonstration is made using test conditions that strictly control any potential artifact pertaining to targetdistractor similarity. The surface-based code suggested by this surface-conjunction effect is strictly 2-D, since the effect occurs even when the surfaces are shared between the target and distractors in the 2-D image but not in their 3-D instantiation. Congruently, this latter finding is unaltered by manipulations of the richness of the depth information offered by the stimuli. It is proposed that human vision uses a 2-D surface-based code for shape representation which, considering other key findings in the field, probably coexists with an alternative representation mode based on a type of structural description that can integrate information pertaining to the 3-D aspect of shapes.

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confidence: 59%

A surface-based code contributes to visual shape perception

et al. 2019

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“…These findings are also relevant to other recent work concerning the underlying mechanisms, neural substrates, and time course of shape information processing. For example, Oliver et al (2018) recently reported modulation of N1 amplitude during the perceptual processing of complex 3-D novel objects under conditions of mono or stereo viewing. This N1 amplitude modulation was found between 145-190 ms over posterior electrodes, and related to 3-D object shape similarity defined in terms of either shared local volumetric part structure or global spatial configuration.…”

Section: Discussionmentioning

confidence: 99%

“…For example, Oliver et al . (2018 (see also Leek et al ., 2016) found distinct patterns of ERP modulation over posterior electrodes on an N1 component (145–190 ms post‐stimulus onset) reflecting differential processing of global and local (part‐based) 3‐D object similarity. This suggests that global and local shape structure is computed relatively early during the perceptual analysis of 3‐D object shape.…”

Section: Introductionmentioning

confidence: 97%

“…The high temporal resolution of event-related potentials (ERPs) provides an opportunity to measure implicit differential perceptual processing of 3-D object structure, elucidate the time course of processing, and to test theoretical hypotheses about the organisation and structure of 3-D object representations (e.g., Leek et al, 2007;Lloyd-Jones et al, 2012;Schendan & Kutas, 2007). In recent work using ERPs, it has been shown that, relatively early during the perceptual processing of 3-D object shape, signal amplitudes are differentially modulated by global and local shape similarity (Leek et al, 2016;Oliver et al, 2018;Pegna et al, 2018). For example, Oliver et al (2018(see also Leek et al, 2016 found distinct patterns of ERP modulation over posterior electrodes on an N1 component (145-190 ms post-stimulus onset) reflecting differential processing of global and local (part-based) 3-D object similarity.…”

Section: Introductionmentioning

confidence: 99%

“…In recent work using ERPs, it has been shown that, relatively early during the perceptual processing of 3-D object shape, signal amplitudes are differentially modulated by global and local shape similarity (Leek et al, 2016;Oliver et al, 2018;Pegna et al, 2018). For example, Oliver et al (2018(see also Leek et al, 2016 found distinct patterns of ERP modulation over posterior electrodes on an N1 component (145-190 ms post-stimulus onset) reflecting differential processing of global and local (part-based) 3-D object similarity. This suggests that global and local shape structure is computed relatively early during the perceptual analysis of 3-D object shape.…”

Section: Introductionmentioning

confidence: 99%

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Early sensitivity of evoked potentials to surface and volumetric structure during the visual perception of three‐dimensional object shape

Leek

Roberts

Dundon

et al. 2018

Eur J of Neuroscience

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This study used event-related potentials (ERPs) to elucidate how the human visual system processes three-dimensional (3-D) object shape structure. In particular, we examined whether the perceptual mechanisms that support the analysis of 3-D shape are differentially sensitive to higher order surface and volumetric part structure. Observers performed a whole-part novel object matching task in which part stimuli comprised sub-regions of closed edge contour, surfaces or volumetric parts. Behavioural response latency data showed an advantage in matching surfaces and volumetric parts to whole objects over contours, but no difference between surfaces and volumes. ERPs were analysed using a convergence of approaches based on stimulus dependent amplitude modulations of evoked potentials, topographic segmentation, and spatial frequency oscillations. The results showed early differential perceptual processing of contours, surfaces, and volumetric part stimuli. This was first reliably observed over occipitoparietal electrodes during the N1 (140-200 ms) with a mean peak latency of 170 ms, and continued on subsequent P2 (220-260 ms) and N2 (260-320 ms) components. The differential sensitivity in perceptual processing during the N1 was accompanied by distinct microstate patterns that distinguished among contours, surfaces and volumes, and predominant theta band activity around 4-7 Hz over right occipitoparietal and orbitofrontal sites. These results provide the first evidence of early differential perceptual processing of higher order surface and volumetric shape structure within the first 200 ms of stimulus processing. The findings challenge theoretical models of object recognition that do not attribute functional significance to surface and volumetric object structure during visual perception.

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