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Attentional Disorders & Mechanisms Presentation

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Attention - 1 Chapter 3 Attention  Selectively processing some stimuli and not others Attention Mechanism Needs To  Monitor world (respond to many stimuli, at some level)  Decide what to attend to  Organize attentional resources to that  Successfully ignore the rest  Has a limited capacity! Attentional Disorders  Can you think of any disorders that involve problems with attentional processing?      ADD ADHD Terrets Autism Schizophrenia Characteristics of Attention  Focalization ◼ Selectivity ◼ Paying attention to some aspects in environment, but not others  Concentration ◼ Mental effort ◼ Amount of mental capacity required to perform a task Theories of Attention  Selectivity ◼ Bottle-neck theories ◼ Stage that cannot process all the information  Mental Effort ◼ Capacity theories ◼ Determine how much mental effort is allocated to different activities Bottle-neck Theories  Broadbent’s Filter Model  Treisman’s Attenuation Model  Deutsch and Norman’s Memory Selection Models Broadbent’s Filter Model  Donald Broadbent (1950s) ◼ Dichotic listening task – had people listen to information by using the auditory system. It was easier for people to do. Gave information to different ears, left and right. ◼ Left ear : 7 Right ear : 3 ◼ Left ear : 4 Right ear : 2 ◼ Left ear : 1 Right ear : 5 Broadbent’s Filter Model  Task 1: “report digits in any order”  Results: ◼ ...
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