کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
4328726 1614189 2009 7 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Top–down and bottom–up interaction: manipulating the dichotic listening ear advantage
موضوعات مرتبط
علوم زیستی و بیوفناوری علم عصب شناسی علوم اعصاب (عمومی)
پیش نمایش صفحه اول مقاله
Top–down and bottom–up interaction: manipulating the dichotic listening ear advantage
چکیده انگلیسی

The aim of the study was to investigate interactions between top–down and bottom–up information processing in the auditory domain. For this purpose, thirty-five right-handed participants with normal hearing acuity were tested with consonant–vowel dichotic stimulus pairs. Bottom–up stimulus characteristics were manipulated by gradually varying interaural intensity difference from − 21 dB in favor of the left ear to + 21 dB in favor of the right ear (including a no difference baseline condition). Top–down manipulation consisted of three conditions with different attention instructions: one free report condition, and each one condition requiring the participants to focus their attention on the right ear and on the left ear, respectively. The results showed a significant interaction of bottom–up and top–down manipulations with respect to the modulation of the ear advantage. Post-hoc analysis showed that the effect of directing attention was reduced when the intensity difference favored the to-be-attended ear. Thus, bottom–up intensity and top–down attention manipulations should not be regarded as independent but rather interacting factors when it comes to the manipulation of the ear advantage in a dichotic listening situation.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Brain Research - Volume 1250, 23 January 2009, Pages 183–189
نویسندگان
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