Abstract:
:The method of constant stimuli was used to examine the accuracy with which two-dimensional spatial information can be represented in mental images. In experiment 1, subjects had to decide which of two successively presented two-dot separations was wider. Over the range of interstimulus intervals employed (0 to 30s), there was a linear relationship between interstimulus interval and spatial interval thresholds. In experiment 2 subjects' abilities to represent accurately more than one spatial interval at a time was investigated. Three dot pairs were presented, but only two pairs were to be compared, the third being completely irrelevant to the task. This manipulation doubled thresholds (relative to a two-dot-pair control condition), whether or not subjects were obliged to attend to the irrelevant dots. Overall, the results suggest that mental representations of spatial information may be temporally durable, but only in the absence of extraneous stimuli. The latter not only disrupt memory for spatial information, but appear to have obligatory access to it.
journal_name
Perceptionjournal_title
Perceptionauthors
Hole GJdoi
10.1068/p250053subject
Has Abstractpub_date
1996-01-01 00:00:00pages
53-64issue
1eissn
0301-0066issn
1468-4233journal_volume
25pub_type
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