chp. 7 vocab, Student's Guide to Cog. Neuroscience (Ward)

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egocentric space

map of spaced coded relative to position of the body

retinocentric space

map of space coded relative to position of eye gaze

allocentric space

map of space coding the locations of objects and places relative to each other

cross-modal perception

integrating information across sensory modalities

attention

process by which certain information is selected for further processing and other information is discarded

inhibition of return

slowing of reaction time associated with going back to a previously attended location

exogenous orienting

attention that is externally guided by a stimulus

endogenous orienting

attention is guided by goals of the perceiver

visual search

task of detecting the presence or absence of a specified target object in an array of other distracting objects

pseudoneglect

in a non-lesioned brain there is over-attention to the left side of space

pop-out

ability to detect an object amongst distractor objects in situations in which the number of distractors presented is unimportant

illusiory conjunctions

situation in which visual features of two different objects are incorrectly perceived as being associated to a single object

early selection

theory of attention in which information is selected according to perceptual attributes

late selection

theory of attention in which all incoming information is processed up to the level of meaning (semantics) before being selected for further processing

negative priming

if an ignored object suddenly becomes the attended object then participants are slower at processing it

neglect

failure to attend to stimuli on the opposite side of space to lesion

ventriloquist effect

tendency to mis-localize heard sounds onto a seen source of potential sounds

Balint's syndrome

severe difficulty in spatial processing normally following bilateral lesions of parietal lobe; symptoms include simultanagonosia, optic ataxia, and optic apraxia

simultanagnosia

inability to perceive more than one object at a time

line bisection

task involving judging the central point of a line

cancellation task

variant of the visual search paradigm in which patient must search for targets in an array normally striking them through as they are found

extinction

when presented with two stimuli at the same time (one in each hemisphere) then the stimulus on the opposite side of the lesion is not consciously perceived

reference frames

representation system for coding space (e.g. near versus far space, imaginal versus external space)

place cells

neurons that respond when an animal is in a particular location in allocentric space (normally found in the hippocampus)

water maze

test of spatial memory developed for rodents that requires learning and retaining the location of a hidden platform submerged in opaque water

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