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Parallel vs. Serial Information Processing Remember - attention is about information processing
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Parallel vs. Serial Information Processing Remember - attention is about information processing A fundamental question was “how much information can be processed at once?”
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Parallel vs. Serial Information Processing Remember - attention is about information processing A fundamental question was “how much information can be processed at once?” –The answer seemed to be “not much” - but can we get a better understanding ?
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Parallel vs. Serial Information Processing Remember - attention is about information processing A fundamental question was “how much information can be processed at once?” –The answer seemed to be “not much” - but can we get a better understanding ? At issue is whether or not the brain can processes several items at once or must selectively attend to each item in turn
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Parallel vs. Serial Information Processing How could you determine that ?
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Parallel vs. Serial Information Processing How could you determine that ? Visual Search paradigms
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Visual Search Is there a green square?
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Visual Search Parallel search: like many independent spotlights
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Visual Search Serial search: each item is selected until target is found
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Visual Search Serial search: each item is selected until target is found
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Visual Search Serial search: each item is selected until target is found
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Visual Search Serial search: each item is selected until target is found
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Visual Search How could you test which kind of search was happening?
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Visual Search Search Slope: How long per item?
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Visual Search Search Slope: How long per item?
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Visual Search Search Slope: How long per item?
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Visual Search Serial Search - linear increase in search time with number of distractors
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Visual Search Parallel search - search time is independent of distracter number
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Visual Search Search slope for color singletons is flat. What does this tell us about color and attention?
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Next Time: Treisman Article!
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