Results 211 to 220 of about 3,643 (238)
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Egocentric and allocentric reference frames for catching a falling object
Experimental Brain Research, 2009When programming movement, one must account for gravitational acceleration. This is particularly important when catching a falling object because the task requires a precise estimate of time-to-contact. Knowledge of gravity's effects is intimately linked to our definition of 'up' and 'down'.
Anne Brec'hed, Le Séac'h +2 more
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The role of vision in egocentric and allocentric spatial frames of reference
Cognitive Processing, 2009IntroductionSpatial frames of reference are necessary to encode and torepresent the position of objects in space. Egocentricframes define spatial information in relation to the body,while allocentric ones use external landmarks (e.g. Paillard1991).
RUGGIERO, Gennaro +2 more
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Spatial egocentrism and the effect of an alternate frame of reference
Journal of Experimental Child Psychology, 1980Abstract The present study contrasted two possible explanations of spatial egocentrism in spatial perspective tasks. By one account children's judgments in perspectivetaking tasks are based on relations between the self (ego) and the target array.
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Disentangling Gravitational, Environmental, and Egocentric Reference Frames in Spatial Neglect
Journal of Cognitive Neuroscience, 1998Previous studies in neglect patients using rotation of the body around the roll-axis revealed neglect of visual stimuli not only in the egocentric, body-centered left but also in the environmental left. The latter has been taken as evidence for a gravity-based environment-centered component of neglect occurring independently of the subject's actual ...
H O, Karnath, M, Fetter, M, Niemeier
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Qualitative Motion Representation in Egocentric and Allocentric Frames of Reference
1999In qualitative motion representation, frames of reference play an important role as well in measuring of the motion data as in representation and application of algorithms. This paper discusses motion representation in egocentric and allocentric frames of reference and begins with some general considerations on motion representation through qualitative
Alexandra Musto +4 more
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Flexible egocentric and allocentric representations of heading signals in parietal cortex
Proceedings of the National Academy of Sciences of the United States of America, 2018 Significance Body-centered (egocentric) and world-centered (allocentric) spatial reference frames are both important for spatial navigation. We have previously shown that vestibular heading signals, which are initially coded in a head-centered ...
Xiaodong Chen +2 more
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Interaction between allocentric and egocentric reference frames in deaf and hearing populations
Neuropsychologia, 2014Spatial position of an object can be represented in the human brain based on two types of reference frames: allocentric and egocentric. The perception/action hypothesis of the ventral/dorsal visual stream proposed that allocentric reference frame codes object positions relative to another object/background subserving conscious perception of the ...
Ming, Zhang +5 more
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A fronto-parietal system for computing the egocentric spatial frame of reference in humans
Experimental Brain Research, 1999Spatial orientation is based on coordinates referring to the subject's body. A fundamental principle is the mid-sagittal plane, which divides the body and space into the left and right sides. Its neural bases were investigated by functional magnetic resonance imaging (fMRI).
Giuseppe Vallar +5 more
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Egocentric Action in Early Infancy: Spatial Frames of Reference for Saccades
Psychological Science, 1997The extent to which infants combine visual (i e, retinal position) and nonvisual (eye or head position) spatial information in planning saccades relates to the issue of what spatial frame or frames of reference influence early visually guided action We explored this question by testing infants from 4 to 6 months of age on the double-step saccade ...
Rick O. Gilmore, Mark H. Johnson
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Cognition, 2006
We studied the development of spatial frames of reference in children aged 3-6 years, who retrieved hidden toys from an array of identical containers bordered by landmarks under four conditions. By moving the child and/or the array between presentation and test, we varied the consistency of the hidden toy with (i) the body, and (ii) the testing room ...
Marko, Nardini +3 more
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We studied the development of spatial frames of reference in children aged 3-6 years, who retrieved hidden toys from an array of identical containers bordered by landmarks under four conditions. By moving the child and/or the array between presentation and test, we varied the consistency of the hidden toy with (i) the body, and (ii) the testing room ...
Marko, Nardini +3 more
openaire +2 more sources