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Sensation&perception
CH4 Sensation and Perception. Psychology
| Question | Answer |
|---|---|
| Sensation | Stimulation of sense organs |
| Perception | Selection , organization, and interpretation of sensory input |
| Psychophysics | the study of how physical stimuli are translated into psychological experience |
| Fechner | The concept of the threshold |
| Absolute threshold | detected @ 50% of the time |
| Just noticeable difference (JND) | Smallest difference detectable |
| weber's law | size of JND proportional to size of initial stimulus |
| Signal-Detection Theory | Sensory processes and decision processes |
| Subliminal Perception | Existence vs. practical effects |
| Sensory Adaptation | Decline in Sensitivity |
| Light | electromagnetic radiation |
| amplitude | perception of brightness |
| wavelength | perception of color |
| purity | mix of wavelengths -- perception of saturation |
| saturation | richness of colors |
| Cornea | where light enters the eye |
| Lens | Focuses the light rays on the retina |
| Iris | colored ring of muscle , constricts or dilates via amount of light |
| Pupil | regulates amount of light |
| Retina | absorbs light, processes images |
| Optic Disk | Optic nerve connection/blind spot |
| Receptor cells /Rods | Black & white /low light vision |
| Receptor cells/ Cones | color and daylight vision |
| adaptation | becoming more or less sensitive to light as needed |
| Information processing/ Receptive fields & lateral antagonism | |
| Wavelength | determines color longer = red // shorter= violet |
| Amplitude | determines brightness |
| purity | determines saturation |
| Trichromatic theory | Young and Helmoltz , receptors for red, green, blue -- color mixing |
| Opponent Process History | Hering, 3 pars of antagonistic colors: red/green, blue/yellow, black/white |
| Current perspective of Trichromatic & Opponent process theory | both theories are necessary |
| Perceptual Sets | Motivational forces can foster perceptual sets |
| features detection theory | bottom-up processing |
| Form perception | top-down processing |
| Gestalt psychologists | the whole is more than the sum of its parts Reversible figures and perceptual sets demo that same visual stimulus can result in very different perceptions |
| Gestalt principles of form perception: | figure ground, proximity, similarity, continuity, closure and simplicity |
| Optical Illusions | discrepancy between visual appearances and physical reality |
Created by:
Jlynn89
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