Implicit locaiton encoding via stored representations of familiar objects: Neuropsychological evidence

Lilach Shalev*, Glyn W. Humphreys

*Corresponding author for this work

Research output: Contribution to journalReview articlepeer-review

Abstract

We report data on the visual localisation ability of a patient with Balint's syndrome, GK. We show that, with relatively long exposures of displays, GK is better able to judge the spatial relations between separate objects (a "between-object judgement") than the spatial relations between a part and a whole object (a "within-object judgement") (Experiments 1-3). This dissociation occurred even when the same stimulus was used for both judgements, and the task instructions biased GK to parse the stimulus as either a single or as two separate objects (Experiments 2 and 6). However, when he could use a stored representation to make a within-object judgement, then performance was better than on a comparable spatial judgement of the relations between two separate objects (Experiments 4-7). The data demonstrate that stored representations of objects can support the spatial coding of parts to perceptual wholes. In the absence of stored representations, part-whole relations must be explicitly coded by attention, a process that is impaired in this patient.

Original languageEnglish
Pages (from-to)721-744
Number of pages24
JournalCognitive Neuropsychology
Volume19
Issue number8
DOIs
StatePublished - Dec 2002
Externally publishedYes

Funding

FundersFunder number
Rold Ftudhtonthse
Biotechnology and Biological Sciences Research Council
Mauritius Research Council

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