STIMULUS-SPECIFIC MECHANISMS OF VISUAL SHORT-TERM-MEMORY

被引：120

作者：

MAGNUSSEN, S ^{[1
]}

GREENLEE, MW ^{[1
]}

ASPLUND, R ^{[1
]}

DYRNES, S ^{[1
]}

机构：

[1] UNIV FREIBURG,DEPT NEUROPHYSIOL,W-7800 FREIBURG,GERMANY

来源：

VISION RESEARCH | 1991年 / 31卷 / 7-8期

关键词：

SHORT-TERM MEMORY; SPATIAL FREQUENCY; STIMULUS SPECIFICITY;

D O I：

10.1016/0042-6989(91)90046-8

中图分类号：

Q189 [神经科学];

学科分类号：

071006 ;

摘要：

The retention of spatial information in visual short-term memory was assessed by measuring spatial frequency discrimination thresholds with a two-interval forced-choice task varying the time interval between the two gratings to be compared. The memory of spatial frequency information was perfect across 10-sec interstimulus intervals. Presentation of a "memory masker" grating during the interstimulus interval may interfere with short-term memory. This interference depends on the relative spatial frequency of the test and masker grating, with maximum interference at spatial frequency differences of 1-1.5 octaves and beyond. This range of interference with short-term memory is comparable to the bandwidth of sensory masking or adaptation. A change of the relative orientation of test and masker gratings does not produce interference with spatial frequency discrimination thresholds. These results suggest stimulus-specific interactions at higher-level representations of visual form.

引用

页码：1213 / 1219

页数：7

共 32 条

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