psy2_lec8_sensation - Sensation: incoming information How...

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Sensation: incoming information How we pick up and process sensory input
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Sensation and perception s Sensation: sensory receptors and nervous system receive and represent stimulus energies from the environment b Bottom-up processing s Perception: the process of organizing and interpreting sensory information b Top-down processing s Sense organs are specific: eye neurons make everything = light s Brain areas are specific
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Sensation and perception
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Sensation and perception s Synesthesia: s A B C D E F s A B C D E F s http://synesthete.org/
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Measuring sensation s Absolute threshold: can be detected 50% of the time b Subliminal stimuli and priming s Difference threshold b Just noticeable difference: difference can be detected 50% of the time b Weber’s law: k = constant proportion s 2% for weight, 8% for light…
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Measuring sensation s Signal detection theory b Weak signals: hits vs. false alarms b Individual differences: importance and training b Situational effects Stimulus present Stimulus absent Stimulus perceived Stimulus not perceived HIT FALSE ALARM MISS CORRECT REJECTION
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The five senses s Vision s Haptic sensation (touch) s Audition (hearing) s Olfaction (smelling) s Gustation (taste)
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Vision s The eye: anatomy b Cornea B b Pupil (iris) B b Lens B b Retina s Fovea
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Vision s The retina: photoreceptor cells
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Vision s Photoreceptor cells b bipolar cells b ganglion cells b visual cortex
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This note was uploaded on 04/02/2010 for the course PSYCH 2 taught by Professor Don'tremember during the Spring '04 term at University of California, Berkeley.

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psy2_lec8_sensation - Sensation: incoming information How...

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