The plasticity of near space: Evidence for contraction

Lourenco, Stella F.; Longo, Matthew R.

doi:10.1016/j.cognition.2009.05.011

Cited by 79 publications

(83 citation statements)

References 32 publications

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“…This indicates that bias shifted rightwards with increased viewing distance, consistent with previous results using the landmark task (Bjoertomt et al, 2002;McCourt & Garlinghouse, 2000) and line bisection task (Gamberini et al, 2008;Longo & Lourenco, 2006Lourenco & Longo, 2009;Lourenco et al, 2011;Varnava et al, 2002). Behavioural data from landmark judgments.…”

Section: Behavioural Datasupporting

confidence: 79%

“…Studies investigating line bisection in near and far space have typically found a small leftward bias in near space and a (somewhat larger) rightward bias in far space (e.g., Ferrè et al, 2013;Gamberini et al, 2008;Longo & Lourenco, 2006Lourenco & Longo, 2009;Lourenco et al, 2011;Varnava et al, 2002). In contrast, studies using the landmark task have found a leftward bias in near space and a smaller leftward bias (or no bias at all) in far space (e.g., Bjoertomt et al, 2002Bjoertomt et al, , 2009McCourt & Garlinghouse, 2000; this study).…”

Section: Differences Between Landmark and Bisection Taskscontrasting

confidence: 48%

“…This shift in bias is generally continuous, and the rate at which it occurs has been taken as an index of the extent, or "size," of near space. Indeed, this method has been used to show expansion of near space following tool use (Gamberini et al, 2008;Longo & Lourenco, 2006), contraction of near space when participants wear heavy wrist weights (Lourenco & Longo, 2009), and systematic inter-individual relations between the extent of near space and arm length (Longo & Lourenco, 2007) as well as claustrophobic fear (Lourenco et al, 2011). Studies using the landmark task have reported a similar rightward shift in bias with increased viewing distance, though not an absolute right bias at the farthest viewing distances (Bjoertomt, Cowey, & Walsh, 2002;McCourt & Garlinghouse, 2000).…”

Section: Introductionmentioning

confidence: 75%

“…At each combination of participant, time point, channel, and task, we calculated the linear regression coefficient, regressing mean voltage on viewing distance. The logic of this analysis is analogous to the use of regression to investigate changes in lateral attentional biases with viewing distance as in the current study with the landmark task and previous studies using overt line bisection (e.g., Longo & Lourenco, 2006Lourenco & Longo, 2009;Lourenco et al, 2011;Varnava et al, 2002). By thus regressing voltage on viewing distance, the time-course and scalp-distribution of neural responses modulated by viewing-distance can be assessed and compared between the landmark and colour tasks.…”

Section: Regression Analysesmentioning

confidence: 99%

“…Second, participants are instructed to remain completely still with their heads immobilized with padding. This is potentially problematic given that the ability to act is known to alter spatial perception (e.g., Proffitt, Stefanucci, Banton, & Epstein, 2003;Witt, Proffitt, & Epstein, 2004;Lourenco & Longo, 2009). …”

Section: Introductionmentioning

confidence: 99%

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Right hemisphere control of visuospatial attention in near space

et al. 2015

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Section: Behavioural Datasupporting

confidence: 79%

Section: Differences Between Landmark and Bisection Taskscontrasting

confidence: 48%

Section: Introductionmentioning

confidence: 75%

Section: Regression Analysesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Right hemisphere control of visuospatial attention in near space

et al. 2015

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Near and far space: Understanding the neural mechanisms of spatial attention

Lane¹,

Ball²,

Smith³

et al. 2011

Human Brain Mapping

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Use policyThe full-text may be used and/or reproduced, and given to third parties in any format or medium, without prior permission or charge, for personal research or study, educational, or not-for-prot purposes provided that:• a full bibliographic reference is made to the original source • a link is made to the metadata record in DRO • the full-text is not changed in any way The full-text must not be sold in any format or medium without the formal permission of the copyright holders.Please consult the full DRO policy for further details. ABSTRACTVisuospatial neglect is a multicomponent syndrome and one dissociation reported is between neglect for near (peripersonal) and far (extrapersonal) space. Owing to patient heterogeneity and extensive lesions it is difficult to determine the precise neural mechanisms underlying this dissociation using clinical methodology. In this study transcranial magnetic stimulation was used to examine the involvement of three areas in the undamaged brain while participants completed a conjunction search task in near and far space. The brain areas investigated were right posterior parietal cortex (rPPC), right frontal eye field (rFEF), and right ventral occipital cortex (rVO), each of which has been implicated in visuospatial processing. The results revealed a double dissociation whereby rPPC was involved for search in near space only, whilst rVO only became necessary when the task was completed in far space.These data provide clear evidence for a dorsal and ventral dissociation between the processing of near and far space, which is compatible with the functional roles previously attributed to the two streams. For example, the involvement of the dorsal stream in near space reflects its role in vision for action, since it is within this spatial location that actions can be performed. The results also revealed that rFEF is involved in the processing of visual search in both near and far space, and may contribute to visuospatial attention and/or the control of eye-movements irrespective of spatial frame. We discuss our results with respect to their clear ramifications for clinical diagnosis and neurorehabilitation.Lane, 3

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Thinking about quantity: the intertwined development of spatial and numerical cognition

Newcombe

Levine

Mix

2015

WIRES Cognitive Science

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There are many continuous quantitative dimensions in the physical world. Philosophical, psychological, and neural work has focused mostly on space and number. However, there are other important continuous dimensions (e.g., time and mass). Moreover, space can be broken down into more specific dimensions (e.g., length, area, and density) and number can be conceptualized discretely or continuously (i.e., natural vs real numbers). Variation on these quantitative dimensions is typically correlated, e.g., larger objects often weigh more than smaller ones. Number is a distinctive continuous dimension because the natural numbers (i.e., positive integers) are used to quantify collections of discrete objects. This aspect of number is emphasized by teaching of the count word sequence and arithmetic during the early school years. We review research on spatial and numerical estimation, and argue that a generalized magnitude system is the starting point for development in both domains. Development occurs along several lines: (1) changes in capacity, durability, and precision, (2) differentiation of the generalized magnitude system into separable dimensions, (3) formation of a discrete number system, i.e., the positive integers, (4) mapping the positive integers onto the continuous number line, and (5) acquiring abstract knowledge of the relations between pairs of systems. We discuss implications of this approach for teaching various topics in mathematics, including scaling, measurement, proportional reasoning, and fractions.

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The plasticity of near space: Evidence for contraction

Cited by 79 publications

References 32 publications

Right hemisphere control of visuospatial attention in near space

Right hemisphere control of visuospatial attention in near space

Near and far space: Understanding the neural mechanisms of spatial attention

Thinking about quantity: the intertwined development of spatial and numerical cognition

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