دانلود مقاله ISI انگلیسی شماره 77274
عنوان فارسی مقاله

دوره زمانی پردازش حافظه فضایی در دو نیمکره

کد مقاله سال انتشار مقاله انگلیسی ترجمه فارسی تعداد کلمات
77274 2006 5 صفحه PDF سفارش دهید محاسبه نشده
خرید مقاله
پس از پرداخت، فوراً می توانید مقاله را دانلود فرمایید.
عنوان انگلیسی
The time course of spatial memory processing in the two hemispheres
منبع

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

Journal : Neuropsychologia, Volume 44, Issue 10, 2006, Pages 1914–1918

کلمات کلیدی
حافظه فضایی؛ تفاوت های نیمکره غربی - فواصل نگهداری
پیش نمایش مقاله
پیش نمایش مقاله دوره زمانی پردازش حافظه فضایی در دو نیمکره

چکیده انگلیسی

Previous studies have shown that memories for positions are often distorted in systematic ways, indicating the influence of categorical positions codes which can bias responses in object-relocation tasks towards stored spatial prototypes. In the present study, we examined the time course of these categorical influences. Subjects had to relocate the position of a tachistoscopically presented dot within a circle, which could appear in either the left visual field (i.e. initially to the right hemisphere) or the right visual field (i.e. initially to the left hemisphere). Three retention intervals between presentation and relocation were used: 500, 2000 and 5000 ms. Performance was most accurate with left visual field/ right hemisphere presentation. Systematic distortions were found for angular errors (dot relocations regressed towards the 45° with a quadrant) as well as for radial errors (dots were replaced in the direction of the circle's circumference, and this more so when the dot was further away from the circumference). Importantly, these categorical biases became stronger with retention interval and initial left hemispheric processing. These results suggest that categorical spatial coding might be the default manner in which spatial information is remembered over time. Finally, the left hemisphere may play an important role for such a categorical spatial coding.

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