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    政大機構典藏 > 理學院 > 心理學系 > 期刊論文 >  Item 140.119/66131


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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;Change detection;Feature binding;Functional magnetic resonance imaging;Visual short-term memory
    日期: 2011.12
    上傳時間: 2014-05-21 17:31:45 (UTC+8)
    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 連結: http://dx.doi.org/10.1016/j.bandc.2011.10.001
    DOI: 10.1016/j.bandc.2011.10.001
    顯示於類別:[心理學系] 期刊論文

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