کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
7295519 1474409 2015 9 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
The processing of perceptual similarity with different features or spatial relations as revealed by P2/P300 amplitude
کلمات کلیدی
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
The processing of perceptual similarity with different features or spatial relations as revealed by P2/P300 amplitude
چکیده انگلیسی
Visual features such as “color” and spatial relations such as “above” or “beside” have complex effects on similarity and difference judgments. We examined the relative impact of features and spatial relations on similarity and difference judgments via ERPs in an S1-S2 paradigm. Subjects were required to compare a remembered geometric shape (S1) with a second one (S2), and made a “high” or “low” judgment of either similarity or difference in separate blocks of trials. We found three main differences that suggest that the processing of features and spatial relations engages distinct neural processes. The first difference is a P2 effect in fronto-central regions which is sensitive to the presence of a feature difference. The second difference is a P300 in centro-parietal regions that is larger for difference judgments than for similarity judgments. Finally, the P300 effect elicited by feature differences was larger relative to spatial relation differences. These results supported the view that similarity judgments involve structural alignment rather than simple feature and relation matches, and furthermore, indicate the similarity judgment could be divided into three phases: feature or relation comparison (P2), structural alignment (P3 at 300-400 ms), and categorization (P3 at 450-550 ms).
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: International Journal of Psychophysiology - Volume 95, Issue 3, March 2015, Pages 379-387
نویسندگان
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