Ch 5 book notes

Ch 5 book notes - Ch 5 book notes Sensation- the sense...

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Ch 5 book notes Sensation- the sense organs’ responses to external stimuli and the transmission of these responses to the brain Perception- the processing, organization, and interpretation of sensory signals; it results in an internal representation of the stimulus. Transduction- a process by which sensory receptors produce neural impulses when they receive physical or chemical stimulation o Receptors- specialized neurons in the sense organs Sensory coding- translations of stimuli’s physical properties into neural impulses Qualitative- different sensory receptors respond to qualitatively different stimuli Quantitative- differences in stimuli are coded by the speed of a particular neurons’ firing- more rapidly firing neuron is responding at a higher frequency. Coarse coding- sensory qualities are coded by only a few different types of receptors, each of which responds to a broad range of stimuli Psychophysics- subfield developed during the nineteenth century by researchers Ernst Weber and Gustav Fechner, examines our psychological experiences of a physical stimuli. Absolute threshold- minimum intensity of stimulation that must occur before you experience a sensation, or the stimulus intensity detected above chance. Difference threshold- is the just noticeable difference between two stimuli- the minimum amount of change required for a person to detect a difference. Signal detection theory (SDT)- a theory of perception based on the idea that the detection of a faint stimulus requires a judgment—it is not an all-or-none process. Sensory adaptation- a decrease in sensitivity to a constant level of stimulation. Gestation- sense of taste Taste buds- sensory receptors that transducer taste information Umami- fifth sensation, ‘savory’ or ‘yummy’ Monosodium glutamate (MSG)- flavor enhancer Supertasters- someone who experiences especially intense taste sensations, largely determined by genetics Olfaction- the sense of smell, which occurs when the receptors in the nose respond to chemicals Olfactory epithelium- the thin layer of tissue, within the nasal cavity, that is imbedded with smell receptors Olfactory bulb- the brain center for smell, located below the frontal lobes Haptic sense- the sense of touch Tactile stimulation- gives rise to an integrated experience of touch Gate control theory of pain- for us to experience pain, pain receptors must be activated and a neural ‘gate’ in the spinal cord must allow the signals through to the brain Audition- the sense of sound perception Sound wave- the pattern of the changes in air pressure through the time that results in the
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This note was uploaded on 12/08/2011 for the course PSYC 107 taught by Professor Hull during the Fall '07 term at Texas A&M.

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Ch 5 book notes - Ch 5 book notes Sensation- the sense...

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