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Retrospective Attention Interacts with Stimulus Strength to Shape Working Memory Performance

Orienting attention retrospectively to selective contents in working memory (WM) influences performance. A separate line of research has shown that stimulus strength shapes perceptual representations. There is little research on how stimulus strength during encoding shapes WM performance, and how ef...

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Published in:PloS one 2016-10, Vol.11 (10), p.e0164174-e0164174
Main Authors: Wildegger, Theresa, Humphreys, Glyn, Nobre, Anna C
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description Orienting attention retrospectively to selective contents in working memory (WM) influences performance. A separate line of research has shown that stimulus strength shapes perceptual representations. There is little research on how stimulus strength during encoding shapes WM performance, and how effects of retrospective orienting might vary with changes in stimulus strength. We explore these questions in three experiments using a continuous-recall WM task. In Experiment 1 we show that benefits of cueing spatial attention retrospectively during WM maintenance (retrocueing) varies according to stimulus contrast during encoding. Retrocueing effects emerge for supraliminal but not sub-threshold stimuli. However, once stimuli are supraliminal, performance is no longer influenced by stimulus contrast. In Experiments 2 and 3 we used a mixture-model approach to examine how different sources of error in WM are affected by contrast and retrocueing. For high-contrast stimuli (Experiment 2), retrocues increased the precision of successfully remembered items. For low-contrast stimuli (Experiment 3), retrocues decreased the probability of mistaking a target with distracters. These results suggest that the processes by which retrospective attentional orienting shape WM performance are dependent on the quality of WM representations, which in turn depends on stimulus strength during encoding.
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subjects Adolescent
Adult
Attention
Biology and Life Sciences
Brain research
Coding
Cognitive ability
Consciousness
Cues
Experimental psychology
Female
Humans
Male
Medicine and Health Sciences
Memory
Memory, Short-Term
Noise
Orientation
Psychology
Quality
Recall
Representations
Research and Analysis Methods
Shape memory
Short term memory
Social Sciences
Stimuli
Strength
Studies
Task Performance and Analysis
Visual Perception
Visual task performance
Young Adult
title Retrospective Attention Interacts with Stimulus Strength to Shape Working Memory Performance
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