دانلود مقاله ISI انگلیسی شماره 70221
عنوان فارسی مقاله

توجه انتخابی به ویژگی های صورت با و بدون زمینه صورت: یک ERP مطالعه

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
70221 2002 23 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
Selective attention to a facial feature with and without facial context: an ERP-study
منبع

Publisher : Elsevier - Science Direct (الزویر - ساینس دایرکت)

Journal : International Journal of Psychophysiology, Volume 44, Issue 1, April 2002, Pages 13–35

کلمات کلیدی
ERP؛ توجه انتخابی؛ ویژگی های صورت؛ اثر زمینه - مدولاسیون از بالا به پایین
پیش نمایش مقاله
پیش نمایش مقاله توجه انتخابی به ویژگی های صورت با و بدون زمینه صورت: یک ERP مطالعه

چکیده انگلیسی

Summary. The present experiment addressed the question whether selectively attending to a facial feature (mouth shape) would benefit from the presence of a correct facial context. Subjects attended selectively to one of two possible mouth shapes belonging to photographs of a face with a happy or sad expression, respectively. These mouths were presented randomly either in isolation, embedded in the original photos, or in an exchanged facial context. The ERP effect of attending mouth shape was a lateral posterior negativity, anterior positivity with an onset latency of 160–200 ms; this effect was completely unaffected by the type of facial context. When the mouth shape and the facial context conflicted, this resulted in a medial parieto-occipital positivity with an onset latency of 180 ms, independent of the relevance of the mouth shape. Finally, there was a late (onset at approx. 400 ms) expression (happy vs. sad) effect, which was strongly lateralized to the right posterior hemisphere and was most prominent for attended stimuli in the correct facial context. For the isolated mouth stimuli, a similarly distributed expression effect was observed at an earlier latency range (180–240 ms). These data suggest the existence of separate, independent and neuroanatomically segregated processors engaged in the selective processing of facial features and the detection of contextual congruence and emotional expression of face stimuli. The data do not support that early selective attention processes benefit from top-down constraints provided by the correct facial context.

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