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20 Cards in this Set
- Front
- Back
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Sensation
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The direct effect of stimulation of receptor cells by a stimulus
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Perception
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Our organization and interpretation of sensory experience
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Transduction
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The process by which sensory organs transform mechanical, chemical, or light energy into neural activity
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Psychophysics
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The part of psychology that focuses on the relationship between physical aspects of external stimuli and our perception of them
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Threshold
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Minimum level of intensity or strength of a stimulus that is sufficient to activate a sensory process
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Absolute Threshold
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Minimum physical intensity of a stimulus that can be perceived by an observer 50% of the time.
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Difference Threshold
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The minimum increase in the intensity of a stimulus necessary to just notice a change 50% of the time.
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Weber's Law
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The strength of the original stimulus increases, the magnitude of the change must also increase in order for a just noticeable difference to be perceived.
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Attention
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Psychological selection mechanism that determines which stimuli an organism responds to or perceives
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Sensory adaption
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Describes the decrease in the response of sensory receptors when they are exposed to continual, unchanging stimulation.
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Brightness
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The intensity of light is measured by the number of phontons
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Hue
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The color we perceive is determined partly by the wavelength of light.
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Saturation
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Determines how colorful light appears.
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Retina
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Thin membrane at the back of the eye containing photoreceptors called rods and cones. Function is to record images.
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Rods
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Photoreceptor cells distributed across the inner layer of the retina that are important in peripheral vision and seeing dim light.
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Cones
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Photoreceptor cells distributed across the inner layer of the retina that play an important role in the perception of color.
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Dark Adaptation
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Process by which an organism's vision gradually becomes more sensitive to minimal levels of light due to a chemical change in the rods and cones in the retina.
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Light Adaptation
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Process by which an organism's vision adjusts to bright lighting due to a chemical change in the rods and cones in the retina.
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Trichromatic Theory
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Three types of color receptors which form the basis for our perception of all colors.
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Afterimage
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Sense experience that occurs after a bright flash.
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