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Chapter Five

Chapter Five. Sensation. The Basics. Sensation The mechanical process by which we “take in” physical information from the outside world Psychophysics Thresholds Absolute vs. j.n.d. Weber’s Law Signal Detection Theory Subliminal Message Semantic Priming Behavior vs. Attitude Adaptation

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Chapter Five

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  1. Chapter Five Sensation

  2. The Basics • Sensation • The mechanical process by which we “take in” physical information from the outside world • Psychophysics • Thresholds • Absolute vs. j.n.d. • Weber’s Law • Signal Detection Theory • Subliminal Message • Semantic Priming • Behavior vs. Attitude • Adaptation • Habituation

  3. Vision • Transduction • Light Energy • Wavelength – hue • Amplitude – intensity • The Eye • Cornea  Pupil (Iris)  Lens  Retina • The Retina • Rods, Cones • Blind Spot & Fovea

  4. Vision (cont’d) • Feature Detection • Parallel Processing • We process several things at once • Visual interpretation takes 30% of the cortex!! • Selective motion neglect • Lateral neglect (blindsight) • Color Vision • Young-Helmholtz Trichromatic Theory • Opponent process theory • Red-green; blue-yellow; black-white • Color blindness • Afterimage Effect • Vision and Learning • Brightness Contrast

  5. Auditory Processing (Audition) • Sound Wave  Outer Ear  Middle Ear  Inner Ear • Sound Wave • Amplitude – loudness (decibels) • Frequency – pitch • Outer Ear • Pinna  Auditory Canal  Tympanic Membrane • Middle Ear • Ossicles: Hammer  Anvil  Stirrup • Inner Ear • Cochlea: Oval Window  Basilar Membrane  Cilia (Loudness) • Auditory Nerve

  6. Perceiving Pitch • Helmholtz’s Place Theory • Different places on the cochlea’s basilar membrane • Frequency Theory • It is the frequency at which the basilar membrane vibrates • Locating sound in space

  7. Heh? What? I can’t hear you! • Conduction hearing loss • Problems with the mechanics of the ear • Eardrum, ossicles • Sensorineural Deafness • Problems with nerves or cilia • Cochlear implant

  8. The Other Senses • Touch • Pressure, temp & pain • Gate theory • Taste • Sweet, Sour, Salty, Bitter • Smell & Taste • Smell • Olfactory Nerve sends to limbic system and temporal lobe

  9. Body Senses • Kinesthesis • Ability to sense position and motion • proprioception • Vestibular Sense • balance • Semicircular canals • Synesthesia

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