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The Competitive Influences of Perceptual Load and Working Memory Guidance on Selective Attention.

Tan J, Zhao Y, Wang L, Tian X, Cui Y, Yang Q, Pan W, Zhao X, Chen A - PLoS ONE (2015)

Bottom Line: Standardized Low Resolution Electrical Tomography Analysis (sLORETA) showed that the WM guidance effect and the perceptual load effect on attention can be localized into the occipital area and parietal lobe, respectively.Merely identifying the cue produced no effect on the P1 or N1 component.These results suggest that in selective attention, the information held in WM could capture attention at the early stage of visual processing in the occipital cortex.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Cognition and Personality of Ministry of Education, Faculty of Psychology, Southwest University, Chong Qing, China.

ABSTRACT
The perceptual load theory in selective attention literature proposes that the interference from task-irrelevant distractor is eliminated when perceptual capacity is fully consumed by task-relevant information. However, the biased competition model suggests that the contents of working memory (WM) can guide attentional selection automatically, even when this guidance is detrimental to visual search. An intriguing but unsolved question is what will happen when selective attention is influenced by both perceptual load and WM guidance. To study this issue, behavioral performances and event-related potentials (ERPs) were recorded when participants were presented with a cue to either identify or hold in memory and had to perform a visual search task subsequently, under conditions of low or high perceptual load. Behavioural data showed that high perceptual load eliminated the attentional capture by WM. The ERP results revealed an obvious WM guidance effect in P1 component with invalid trials eliciting larger P1 than neutral trials, regardless of the level of perceptual load. The interaction between perceptual load and WM guidance was significant for the posterior N1 component. The memory guidance effect on N1 was eliminated by high perceptual load. Standardized Low Resolution Electrical Tomography Analysis (sLORETA) showed that the WM guidance effect and the perceptual load effect on attention can be localized into the occipital area and parietal lobe, respectively. Merely identifying the cue produced no effect on the P1 or N1 component. These results suggest that in selective attention, the information held in WM could capture attention at the early stage of visual processing in the occipital cortex. Interestingly, this initial capture of attention by WM could be modulated by the level of perceptual load and the parietal lobe mediates target selection at the discrimination stage.

No MeSH data available.


Displays grand mean sLORETA images of P1 (80–120 ms) and N1 (150–190 ms) for the four conditions in the WM group.Color bars represent voxel current density values (A/m2).
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pone.0129533.g006: Displays grand mean sLORETA images of P1 (80–120 ms) and N1 (150–190 ms) for the four conditions in the WM group.Color bars represent voxel current density values (A/m2).

Mentions: Estimates of the underlying cortical generators obtained using sLORETA are displayed in Fig 6. As shown in the figure, among four conditions for WM group, P1-related activation was located at superior occipital gyrus (BA 19, peak activation 35, -85, 30). For low-load match condition and high-load match condition, N1-related activation was located at precuneus, an area in parietal lobe, for (BA7, peak activation -10, -65, 65 for low-load match condition; peak activation -10, -60, 55 for high-load match condition). Under low-load mismatch condition and high-load mismatch condition, the maximum N1-related activation was located respectively at superior parietal lobule and inferior parietal lobule (BA7, peak activation -15, 65, 60 for low-load mismatch condition; BA40, peak activation 30, -60, 45 for high-load mismatch condition). All of the above activations have a bilateral feature, only the coordinates of area with maximal activation was reported.


The Competitive Influences of Perceptual Load and Working Memory Guidance on Selective Attention.

Tan J, Zhao Y, Wang L, Tian X, Cui Y, Yang Q, Pan W, Zhao X, Chen A - PLoS ONE (2015)

Displays grand mean sLORETA images of P1 (80–120 ms) and N1 (150–190 ms) for the four conditions in the WM group.Color bars represent voxel current density values (A/m2).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4476695&req=5

pone.0129533.g006: Displays grand mean sLORETA images of P1 (80–120 ms) and N1 (150–190 ms) for the four conditions in the WM group.Color bars represent voxel current density values (A/m2).
Mentions: Estimates of the underlying cortical generators obtained using sLORETA are displayed in Fig 6. As shown in the figure, among four conditions for WM group, P1-related activation was located at superior occipital gyrus (BA 19, peak activation 35, -85, 30). For low-load match condition and high-load match condition, N1-related activation was located at precuneus, an area in parietal lobe, for (BA7, peak activation -10, -65, 65 for low-load match condition; peak activation -10, -60, 55 for high-load match condition). Under low-load mismatch condition and high-load mismatch condition, the maximum N1-related activation was located respectively at superior parietal lobule and inferior parietal lobule (BA7, peak activation -15, 65, 60 for low-load mismatch condition; BA40, peak activation 30, -60, 45 for high-load mismatch condition). All of the above activations have a bilateral feature, only the coordinates of area with maximal activation was reported.

Bottom Line: Standardized Low Resolution Electrical Tomography Analysis (sLORETA) showed that the WM guidance effect and the perceptual load effect on attention can be localized into the occipital area and parietal lobe, respectively.Merely identifying the cue produced no effect on the P1 or N1 component.These results suggest that in selective attention, the information held in WM could capture attention at the early stage of visual processing in the occipital cortex.

View Article: PubMed Central - PubMed

Affiliation: Key Laboratory of Cognition and Personality of Ministry of Education, Faculty of Psychology, Southwest University, Chong Qing, China.

ABSTRACT
The perceptual load theory in selective attention literature proposes that the interference from task-irrelevant distractor is eliminated when perceptual capacity is fully consumed by task-relevant information. However, the biased competition model suggests that the contents of working memory (WM) can guide attentional selection automatically, even when this guidance is detrimental to visual search. An intriguing but unsolved question is what will happen when selective attention is influenced by both perceptual load and WM guidance. To study this issue, behavioral performances and event-related potentials (ERPs) were recorded when participants were presented with a cue to either identify or hold in memory and had to perform a visual search task subsequently, under conditions of low or high perceptual load. Behavioural data showed that high perceptual load eliminated the attentional capture by WM. The ERP results revealed an obvious WM guidance effect in P1 component with invalid trials eliciting larger P1 than neutral trials, regardless of the level of perceptual load. The interaction between perceptual load and WM guidance was significant for the posterior N1 component. The memory guidance effect on N1 was eliminated by high perceptual load. Standardized Low Resolution Electrical Tomography Analysis (sLORETA) showed that the WM guidance effect and the perceptual load effect on attention can be localized into the occipital area and parietal lobe, respectively. Merely identifying the cue produced no effect on the P1 or N1 component. These results suggest that in selective attention, the information held in WM could capture attention at the early stage of visual processing in the occipital cortex. Interestingly, this initial capture of attention by WM could be modulated by the level of perceptual load and the parietal lobe mediates target selection at the discrimination stage.

No MeSH data available.