Ch 6 - Perception

Ch 6 - Perception - Perception Chapter6 The process of...

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Perception Chapter 6 The process of selecting, organizing, and interpreting sensory information, which enables us to recognize meaningful objects and events. Sensation … is a bottom- up or data- driven process. Analysis of signals starts with the senses & information is fed forward to the brain. Perception … is a top- down or concept- driven process. Analysis is guided by (based on) knowledge, experience and expectation. 3 Brain Mechanism of Visual Perception Selective Attention & Visual Search Perceptual Organization ± Form Perception ± Motion Perception ± Perceptual Constancy Perceptual Interpretation ± Sensory Deprivation and Restored Vision ± Perceptual Adaptation ± Perceptual Set ± Perception and the Human Factor Overview Overview
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4 Visual Perception In the Brain Visual Perception In the Brain Feature Analysis Feature Analysis 5 Levels of Analysis Levels of Analysis 6
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7 Selective Attention Selective Attention Perceptions about objects change from moment to moment. We can perceive different forms of the Necker cube; however, we can only pay attention to one aspect of the object at a time. Instructions Instructions Read aloud the words on the next slide, column by column, as fast and accurately as possible Instructions Instructions Name out-loud the ink/display colors of the strings of XXXs that are shown on the next page. Begin with the first column, then the next, etc.
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Instructions Instructions Name out-loud the ink/display colors of the words that are shown on the next page. Begin with the first column, then the next, etc. Typical Results Typical Results 32.45 19.2 12.6 Mean (s) Color- Naming Incongruent Color- Naming Neutral Word Reading Neutral Color-Naming Neutral – Word Reading Neutral shows Color Naming is Slower Color-Naming Incongruent – Color-Naming Neutral s hows Stroop Interference Vi Vi sual Search: sual Search: Illustrated Illustrated In the next slide, find the RED STAR
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Vi Vi sual Search: Illustrated Illustrated In the next slide, find the RED T Visual Search: Data Visual Search: Data RT # of Distractors Attentive Pre-attentive Visual Search: Data Visual Search: Data Preattentive processing Used for figure-ground segregation (e.g., vase/face illusion) Relies on perceptual grouping (based on Gestalt laws) Occurs when searching targets differing from distractors by only 1 feature (pop-out/parallel) Attentive processing Required for finding targets defined by multiple features or feature conjunctions (serial search)
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16 Inattentional Inattentional Blindness Blindness Inattentional blindness
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Ch 6 - Perception - Perception Chapter6 The process of...

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