کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10454587 | 920819 | 2005 | 11 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Stimulus intensity effects on P300 amplitude across repetitions of a standard auditory oddball task
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موضوعات مرتبط
علوم زیستی و بیوفناوری
علم عصب شناسی
علوم اعصاب رفتاری
پیش نمایش صفحه اول مقاله
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چکیده انگلیسی
An evaluation was made of whether stimulus intensity affects changes of P300 amplitude in response to repeated presentation of the target stimulus in a standard auditory oddball task. P300 latency values were also evaluated. Three samples were selected, one for each intensity used: 65, 85 and 105Â dB SPL (sound pressure level). Five hundred tones (5 subblocks, 100 tones each) were presented. P300 amplitude (1) increased from Fz to Pz, (2) was larger at 105 than 65 or 85Â dB SPL, (3) increased from the first to second subblock and decreased from the second subblock onwards at the three intensities, replicating our previous findings at 85Â dB SPL and demonstrating a consistent phenomenon, and (4) at 105Â dB SPL, the decrease was less pronounced, which we attribute to the more intense stimuli capturing the attention in a sustained manner during the task and interfering with the possible automation of the context-updating process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Biological Psychology - Volume 69, Issue 3, July 2005, Pages 375-385
Journal: Biological Psychology - Volume 69, Issue 3, July 2005, Pages 375-385
نویسندگان
Mónica LindÃn, Montserrat Zurrón, Fernando DÃaz,