When does grouping happen?

Palmer, Stephen; Brooks, Joseph; Nelson, Rolf

doi:10.1016/j.actpsy.2003.06.003

Cited by 114 publications

(75 citation statements)

References 22 publications

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“…Hence, complex grouping interactions may well be implemented by simple neural circuits, in accordance with physiological findings (Yasuko Sugase, Yamane, & Ueno, 1999), and contrary to assumptions that grouping happens after basic visual processing is accomplished (e.g. Palmer et al, 2003 …”

Section: Modelingsupporting

confidence: 66%

Spatial grouping determines temporal integration.

Hermens

Scharnowski

Herzog

2009

Journal of Experimental Psychology: Human Perception and Perfor

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To make sense out of a continuously changing visual world, features have to be integrated across space and time. Despite more than a century of research, the mechanisms of features integration are still a matter of debate. To examine how temporal and spatial integration interact, we measured the amount of temporal fusion (a measure of temporal integration) for different spatial layouts. We found that spatial grouping by proximity and similarity can completely block temporal integration. Computer simulations with a simple neural network capture these findings very well, suggesting that the proposed spatial grouping operations may occur already at an early stage of visual information processing.

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Section: Modelingsupporting

confidence: 66%

Spatial grouping determines temporal integration.

Hermens

Scharnowski

Herzog

2009

Journal of Experimental Psychology: Human Perception and Perfor

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“…For instance, whereas it has traditionally been accepted that visual perceptual grouping occurs at a low level of perceptual processing (e.g., Francis & Grossberg, 1996), Palmer and his collaborators (Beck & Palmer, 2002;Palmer, 2002;Palmer, Brooks, & Nelson, 2003) have recently challenged this view. These authors have proposed that "higher" levels of perceptual processing-described as the processes that occur after the creation of an initial set of discrete elements (giving rise to perceptual constancy; e.g., Palmer, 2002)-may also be responsible for the manifestation of perceptual grouping.…”

Section: Discussionmentioning

confidence: 97%

When does visual perceptual grouping affect multisensory integration?

Sanabria¹,

Soto‐Faraco

Chan³

et al. 2004

Cognitive, Affective, & Behavioral Neuroscience

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“…However, since then, others, using different paradigms, have uncovered evidence, often indirect, that at least some perceptual grouping may be operating pre-attentively (Kimchi, 2009;Lamy, Segal, & Ruderman, 2006;Moore & Egeth, 1997;Russell & Driver, 2005), although this is not the case for all types of grouping (Kimchi & Razpurker-Apfeld, 2004). All of these results together have been taken to suggest that grouping may occur at many different levels of processing rather than being a single step that occurs at one point in time (Palmer, Brooks, & Nelson, 2003). Furthermore, different types of grouping may occur at different levels.…”

Section: When Does Grouping Happen?mentioning

confidence: 97%

Traditional and New Principles of Perceptual Grouping

Brooks

2014

Oxford Handbooks Online

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Perceptual grouping refers to the process of determining which regions and parts of the visual scene belong together as parts of higher order perceptual units such as objects or patterns. In the early 20 th century, Gestalt psychologists identified a set of classic grouping principles which specified how some image features lead to grouping between elements given that all other factors were held constant. Modern vision scientists have expanded this list to cover a wide range of image features but have also expanded the importance of learning and other non-image factors. Unlike early Gestalt accounts which were based largely on visual demonstrations, modern theories are often explicitly quantitative and involve detailed models of how various image features modulate grouping. Work has also been done to understand the rules by which different grouping principles integrate to form a final percept. This chapter gives an overview of the classic principles, modern developments in understanding them, and new principles and the evidence for them. There is also discussion of some of the larger theoretical issues about grouping such as at what stage of visual processing it occurs and what types of neural mechanisms may implement grouping principles.

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When does grouping happen?

Cited by 114 publications

References 22 publications

Spatial grouping determines temporal integration.

Spatial grouping determines temporal integration.

When does visual perceptual grouping affect multisensory integration?

Traditional and New Principles of Perceptual Grouping

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