25 terms

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

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