Erp Indices of Attentional Disengagement and Filtering following Reflexive Attentional Capture
نویسندگان
چکیده
CASSIE BARASH FORD: ERP Indices of Attentional Disengagement and Filtering Following Reflexive Attentional Capture (Under the direction of Joseph B. Hopfinger) The goal of this study was dissociate the mechanism of target selection when distractor suppression is required from spatial disengagement and reorienting. Specifically, we aimed to elicit and compare online event-related potential (ERP) indices of these attention mechanisms, the N2pc, IIN and P4pc. Combining the classic spatial cuing paradigm with a modified visual search design allowed the comparison of these components when attention was either reflexively oriented to the location of an upcoming target, or was reflexively captured to the opposite visual field, requiring disengagement and reorienting to the target. Reaction times and early sensory processing ERP components indicated that attention was reflexively captured by the cue, extending established reflexive attention effects from simple cuing paradigms to visual search. The ERP results suggest that the N2pc reliably indexes the direction of spatial attention, but is not an appropriate marker of the shifting of spatial attention. Significant IIN and P4pc components were found only for conditions requiring disengagement, suggesting that both may reflect the disengagement and reorienting of attention, indexing these mechanisms better than the N2pc.
منابع مشابه
The initial stage of visual selection is controlled by top-down task set: new ERP evidence.
Salient visual singleton stimuli produce spatial cueing effects indicative of attentional capture only when they match current task sets, suggesting that capture is subject to top-down control. However, such task-set contingent capture effects could be associated with the top-down controlled disengagement of attention from non-matching stimuli that follows their initial bottom-up salience-drive...
متن کاملA selective impairment in attentional disengagement from erotica in obsessive-compulsive disorder.
Although an attentional bias for threat has been implicated in obsessive-compulsive disorder (OCD), evidence supporting such a bias has been inconsistent. Furthermore, few studies have made distinctions between attentional capture vs. attentional disengagement and the extent to which different emotional content modulates attention in OCD also remains unclear. To address these issues, we examine...
متن کاملIndividual differences in recovery time from attentional capture.
Working memory capacity reflects a core ability of the individual that affects performance on many cognitive tasks. Recent work has suggested that an important covariate of memory capacity is attentional control, and specifically that low-capacity individuals are more susceptible to attentional capture by distractors than high-capacity individuals are, with the latter being able to resist captu...
متن کاملFacilitation or disengagement? Attention bias in facial affect processing after short-term violent video game exposure
Previous research has been inconsistent on whether violent video games exert positive and/or negative effects on cognition. In particular, attentional bias in facial affect processing after violent video game exposure continues to be controversial. The aim of the present study was to investigate attentional bias in facial recognition after short term exposure to violent video games and to chara...
متن کاملProlonged disengagement from attentional capture in normal aging.
Older adults are more vulnerable to a negative impact of irrelevant information on cognitive performance. We used a psychophysical approach to evaluate which aspects of distraction are altered in aging: susceptibility for attention to be captured by a distractor, or the timing of disengagement from processing a distractor. We found that younger and older adults were equally susceptible to a det...
متن کامل