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題名: | Attentional modulation of perceptual comparison for feature binding | 作者: | 郭柏呈 Kuo, Bo-Cheng Rotshtein, Pia Yeh, Yei-Yu |
貢獻者: | 心理系 | 關鍵詞: | Attention; \r\nChange detection; \r\nFeature binding; \r\nFunctional magnetic resonance imaging; \r\nVisual short-term memory | 日期: | 2011 | 上傳時間: | 21-May-2014 | 摘要: | We investigated the neural correlates of attentional modulation in the perceptual comparison process for detecting feature-binding changes in an event-related functional magnetic resonance imaging (fMRI) experiment. Participants performed a variant of a cued change detection task. They viewed a memory array, a spatial retro-cue, and later a probe array. Their task was to judge whether the cued item had changed between the two arrays. Change type was manipulated to be a color-location binding or a color feature change. The retro-cue onset time in the retention interval was manipulated to be early or late. As a consequence of strong inter-item competition, we found strong prefrontal activation for late cues when contrasting the binding-change with the color-change condition. In contrast, we observed a comparable behavioral and neural effect between the two types of change detection when retro-cue was presented early. More importantly, we demonstrated a significant inter-regional correlation between the prefrontal and parietal regions in both binding- and color-change conditions for late cues. In addition, extensive prefrontal–parietal–visual functional connectivity was showed for detecting binding changes in the late-cueing condition. These results support the critical role in prefrontal–parietal–visual functional coupling for resolving strong inter-item competition during the comparison process in the binding-change condition. We provide direct evidence that attention modulates neural activity associated with perceptual comparison, biasing competition in favour of the task-relevant information in order to detect binding changes. | 關聯: | Brain and Cognition, 77(3), 335-344 | 資料類型: | article | DOI: | http://dx.doi.org/10.1016/j.bandc.2011.10.001 |
Appears in Collections: | 期刊論文 |
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