Distinct visual working memory systems for view-dependent and view-invariant representation. Wood, J. N PLoS One, 4(8):e6601, 2009. doi abstract bibtex BACKGROUND: How do people sustain a visual representation of the environment? Currently, many researchers argue that a single visual working memory system sustains non-spatial object information such as colors and shapes. However, previous studies tested visual working memory for two-dimensional objects only. In consequence, the nature of visual working memory for three-dimensional (3D) object representation remains unknown. METHODOLOGY/PRINCIPAL FINDINGS: Here, I show that when sustaining information about 3D objects, visual working memory clearly divides into two separate, specialized memory systems, rather than one system, as was previously thought. One memory system gradually accumulates sensory information, forming an increasingly precise view-dependent representation of the scene over the course of several seconds. A second memory system sustains view-invariant representations of 3D objects. The view-dependent memory system has a storage capacity of 3-4 representations and the view-invariant memory system has a storage capacity of 1-2 representations. These systems can operate independently from one another and do not compete for working memory storage resources. CONCLUSIONS/SIGNIFICANCE: These results provide evidence that visual working memory sustains object information in two separate, specialized memory systems. One memory system sustains view-dependent representations of the scene, akin to the view-specific representations that guide place recognition during navigation in humans, rodents and insects. The second memory system sustains view-invariant representations of 3D objects, akin to the object-based representations that underlie object cognition.
@Article{Wood2009,
author = {Justin N Wood},
journal = {PLoS One},
title = {Distinct visual working memory systems for view-dependent and view-invariant representation.},
year = {2009},
number = {8},
pages = {e6601},
volume = {4},
abstract = {BACKGROUND: How do people sustain a visual representation of the environment?
Currently, many researchers argue that a single visual working memory
system sustains non-spatial object information such as colors and
shapes. However, previous studies tested visual working memory for
two-dimensional objects only. In consequence, the nature of visual
working memory for three-dimensional (3D) object representation remains
unknown. METHODOLOGY/PRINCIPAL FINDINGS: Here, I show that when sustaining
information about 3D objects, visual working memory clearly divides
into two separate, specialized memory systems, rather than one system,
as was previously thought. One memory system gradually accumulates
sensory information, forming an increasingly precise view-dependent
representation of the scene over the course of several seconds. A
second memory system sustains view-invariant representations of 3D
objects. The view-dependent memory system has a storage capacity
of 3-4 representations and the view-invariant memory system has a
storage capacity of 1-2 representations. These systems can operate
independently from one another and do not compete for working memory
storage resources. CONCLUSIONS/SIGNIFICANCE: These results provide
evidence that visual working memory sustains object information in
two separate, specialized memory systems. One memory system sustains
view-dependent representations of the scene, akin to the view-specific
representations that guide place recognition during navigation in
humans, rodents and insects. The second memory system sustains view-invariant
representations of 3D objects, akin to the object-based representations
that underlie object cognition.},
doi = {10.1371/journal.pone.0006601},
keywords = {19668380},
}
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METHODOLOGY/PRINCIPAL FINDINGS: Here, I show that when sustaining information about 3D objects, visual working memory clearly divides into two separate, specialized memory systems, rather than one system, as was previously thought. One memory system gradually accumulates sensory information, forming an increasingly precise view-dependent representation of the scene over the course of several seconds. A second memory system sustains view-invariant representations of 3D objects. The view-dependent memory system has a storage capacity of 3-4 representations and the view-invariant memory system has a storage capacity of 1-2 representations. These systems can operate independently from one another and do not compete for working memory storage resources. CONCLUSIONS/SIGNIFICANCE: These results provide evidence that visual working memory sustains object information in two separate, specialized memory systems. One memory system sustains view-dependent representations of the scene, akin to the view-specific representations that guide place recognition during navigation in humans, rodents and insects. The second memory system sustains view-invariant representations of 3D objects, akin to the object-based representations that underlie object cognition.","doi":"10.1371/journal.pone.0006601","keywords":"19668380","bibtex":"@Article{Wood2009,\n author = {Justin N Wood},\n journal = {PLoS One},\n title = {Distinct visual working memory systems for view-dependent and view-invariant representation.},\n year = {2009},\n number = {8},\n pages = {e6601},\n volume = {4},\n abstract = {BACKGROUND: How do people sustain a visual representation of the environment?\n\tCurrently, many researchers argue that a single visual working memory\n\tsystem sustains non-spatial object information such as colors and\n\tshapes. However, previous studies tested visual working memory for\n\ttwo-dimensional objects only. In consequence, the nature of visual\n\tworking memory for three-dimensional (3D) object representation remains\n\tunknown. METHODOLOGY/PRINCIPAL FINDINGS: Here, I show that when sustaining\n\tinformation about 3D objects, visual working memory clearly divides\n\tinto two separate, specialized memory systems, rather than one system,\n\tas was previously thought. One memory system gradually accumulates\n\tsensory information, forming an increasingly precise view-dependent\n\trepresentation of the scene over the course of several seconds. A\n\tsecond memory system sustains view-invariant representations of 3D\n\tobjects. The view-dependent memory system has a storage capacity\n\tof 3-4 representations and the view-invariant memory system has a\n\tstorage capacity of 1-2 representations. These systems can operate\n\tindependently from one another and do not compete for working memory\n\tstorage resources. CONCLUSIONS/SIGNIFICANCE: These results provide\n\tevidence that visual working memory sustains object information in\n\ttwo separate, specialized memory systems. One memory system sustains\n\tview-dependent representations of the scene, akin to the view-specific\n\trepresentations that guide place recognition during navigation in\n\thumans, rodents and insects. The second memory system sustains view-invariant\n\trepresentations of 3D objects, akin to the object-based representations\n\tthat underlie object cognition.},\n doi = {10.1371/journal.pone.0006601},\n keywords = {19668380},\n}\n\n","author_short":["Wood, J. 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