lec03-3 - Hemispatial Neglect & Object-Based Attention...

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Hemispatial Neglect Psychology 355: Cognitive Psychology Winter Quarter 2009 1/22/2009
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P 355, Miyamoto, Winter '09 2 Outline • Automaticity – very briefly • Hemispatial Neglect - A Pathology of Attention • Introduction to Object-Based Attention • Object-Based Attention in Patients with Hemispatial Neglect Next: Summary re Automatic & Controlled Processes
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P 355, Miyamoto, Winter '09 3 Summary re Automatic and Controlled Processes • Automatic processes occur without conscious control; automatic processes do not interfere with other concurrent mental activities. • Controlled processes require conscious attention in order to carry them out. • Dividing attention between several controlled processes results in lower performance (slower or less accurate) on these processes. • Divided attention (task sharing) becomes easier and performance improves as tasks become automatized. • Obviously practice promotes automatization. • Some tasks cannot be automatized. • Textbook & the lecture notes (previous lecture, lec03-2.ppt) describe the Schneider & Shiffrin experiment that supports these claims. • Briefly, why is this topic interesting? Next: Hemispatial Neglect – What Is It?
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P 355, Miyamoto, Winter '09 4 Hemispatial Neglect – A Pathology of Attention This slide is based on instructional material that was downloaded from the Pearson Publishers website (http://vig.prenhall.com) for Smith & Kosslyn (2006; ISBN 9780131825086). The patient’s copy in the right column neglects the left side of the visual field (opposite to the side of brain damage). Next: More Examples of Effects of Right Parietal Injury Hemispatial Neglect: A deficit of attention in which one entire half of a visual scene is simply ignored. The cause of hemispatial neglect is often a stroke that has interrupted the flow of blood to the right parietal lobe. Figure to the right: Patient’s copy of an image (model) shows systematic deficits.
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5 More Examples of Hemispatial Neglect a) Brain scan of patient showing right parietal damage (head faces up) b) Drawings made by patient. c)
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This note was uploaded on 10/05/2009 for the course PSYCH 355 taught by Professor Miyamoto during the Winter '08 term at University of Washington.

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lec03-3 - Hemispatial Neglect & Object-Based Attention...

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