Lecture18_Attention_S

Lecture18_Attention_S - Attention Consciousness Readings...

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Attention & Consciousness Readings: “Silent Land: Soul in a Bucket; Articles of Faith; The Ghost Tree (2)” “Phantoms” Ch 4
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Review Questions 1. What are some of the characteristic symptoms of dementia? 2. What is the difference between degenerative & non- degenerative dementia? 3. Describe Huntington’s disease & Parkinson’s disease: symptoms, neuropathology, treatment. 4. What distinguishes Alzheimer’s dementia (AD) from age-related dementia? 5. Describe some of the hallmark pathologies associated w/ AD. 6. What are the potential causes of AD? 7. List some forms of AD treatment.
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Attention Outline I. Introduction II. Attention I. Processing II. Neurophysiological & imaging evidence III. Networks IV. Mechanisms V. Inattention III. Consciousness I. Overview II. Neural correlates III. Alterations
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I. Attention & Consciousness – What are They? Attention : selective awareness of part of environment; “mental spotlight” Can be “unconscious” (e.g., blindsight) Consciousness : awareness & awareness of awareness Does attention=consciousness? Attention is “top-down”, selecting certain stimuli (certain features of the world) Consciousness summarizes all available information (gist of whole world) No!
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II. Attention Automatic vs conscious processes Automatic: direct behavior involuntarily without conscious awareness bottom-up Conscious: requires directed attention top-down
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II.I Automatic vs Conscious Processing Treisman’s visual processing task Feature search : look only for specific feature; relatively automatic; innate to visual system Serial search : scanning from 1 object to the next Conjunction search : searching for particular combinations of stimuli (e.g., line weight & form)
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Treisman’s Model of Feature Search
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What is a “Feature”?
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