Feature binding in visual short-term memory is unaffected by task-irrelevant changes of location, shape, and color.
Three experiments used a change detection paradigm across a range of study-test intervals to address the respective contributions of location, shape, and color to the formation of bindings of features in sensory memory and visual short-term memory (VSTM). In Experiment 1, location was designated task irrelevant and was randomized between study and test displays. The task was to detect changes in the bindings between shape and color. In Experiments 2 and 3, shape and color, respectively, were task irrelevant and randomized, with bindings tested between location and color (Experiment 2) and location and shape (Experiment 3). At shorter study-test intervals, randomizing location was most disruptive, followed by shape and then color. At longer intervals, randomizing any task-irrelevant feature had no impact on change detection for bindings between features, and location had no special role. Results suggest that location is crucial for initial perceptual binding but loses that special status once representations are formed in VSTM, which operates according to different principles, than do visual attention and perception.
University of Edinburgh, Edinburgh, UK. rlogie@staffmail.ed.ac.uk
Robert H
RH
Logie
James R
JR
Brockmole
Snehlata
S
Jaswal
D000293:Adolescent; D000328:Adult; D001245:Association Learning; D001288:Attention; D003118:Color Perception; D004193:Discrimination Learning; D005260:Female; D006801:Humans; D008297:Male; D008570:Memory, Short-Term; D009949:Orientation; D010364:Pattern Recognition, Visual; D012153:Retention, Psychology; D013028:Space Perception; D055815:Young Adult
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