sensation - process in which sense organ receptors are stimulated and that info is sent to the brain, psychophysics - branch of psychology that focuses on the relationships between physical stimuli and conscious experience of them, sensory adaptation - loss of responsiveness in receptor cells after stimulation as remained unchanged for a while, transduction - transformation of one form of energy into another, receptors - specialized neurons that are activated by stimulation and transduce and convert it into a nerve impulse, sensory pathway - bundles of neurons that carry info from the sense organs to the brain, absolute threshold - minimum level of stimuli needed to excite perceptual system, difference threshold - the amount of stimulus change needed for one to detect a change at least 50% of the time (JND), method of limits - testing method used to find out the level at which a stimuli can be detected, Weber's Law - the size of the JND is proportional to intensity of stimulus, Fechner's Law - a different version of Weber's Law that he called the measurement formula, Steven's Power Law - more accurate version of Fechner's Law, especially for pain and temperature, Signal Detection Theory - perceptual judgment as combo of sensation and decision making processes; relationship between physical stimuli and one's conscious experience of them, subliminal perception - stimuli are below the threshold of awareness, but perception occurs outside of conscious experience, selective attention - ability to process certain stimuli from among many; paying attention to 1 or 2 things at a time, cocktail party phenomenon - you cannot hear all the convos in a party, but you can notice if you hear your name across the room, allocation - to apportion for specific attention, to use mental resource for attention, filter theory - all info is screened out due to limited processing ability, EMR - electromagnetic radiation, hue - psychological sensation derived from the wavelength of visible light, brightness - sensation caused by intensity of light waves, saturation - depth of hue determined by homogeneity of wavelengths contained in reflected light, trichromats - people with normal color vision who have all 3 types of cones, Trichromatic Theory - The idea there are 3 types of cones that are sensitive to red, blu, and green wavelengths, Opponent-Process Theory - idea that three types of cones process color in complementary pairs; all fire, but one is stronger, dichromats - one can only perceive 2 or 3 basic colors (color blindness), monochromats - no colors are perceived, afterimages - sensations that linger after the stimulus is removed,

Sensation Vocabulary

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