sensation lecture

sensation lecture - Sensation Jamal Mansour...

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Unformatted text preview: Sensation Jamal Mansour Jamal_mansour@sfu.ca Sensation vs. Perception Sensation Stimulation of sense organs Passive Perception Selection, organization and interpretation of sensory input Active What letter do you see? Sensation vs. Perception Psychophysics Gustav Fechner (1801-1887) hresholds Thresholds dividing point between energy levels that do and do not have a noticeable effect Thresholds Absolute threshold Minimum amount of stimulation that an organism can detect for a specific sensory input Difference threshold Minimum difference between two stimuli for the person to be able to detect them as different aka Just noticeable difference (JND) Absolute Thresholds Vision candle flame at 50 kilometers on a clear night Absolute Thresholds Hearing tick of a watch at 6 metres in a quiet room Absolute Thresholds Taste one teaspoon of sugar in 2 gallons of water Absolute Thresholds Smell 1 drop of perfume in a 3 room apartment Absolute Thresholds Touch the wing of bee falling on your cheek from 1 centimeter Signal Detection Theory Response bias Tendency to say yes or no that a stimulus is present Decision criterion How much evidence is needed to say a stimulus has been detected Signal Detection Theory Stimulus Yes No Response Yes Hit False Alarm No Miss Correct Rejection Signal Detection Task Read Listen The Five Senses Vision Hearing Touch Taste Smell Vision the stimulus We sense only a small range of light waves Vision the stimulus Saturation is related to the purity of the wavelengths Vision the stimulus gatherer Vision the stimulus gatherer...
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This note was uploaded on 03/17/2012 for the course MACM 201 taught by Professor Marnimishna during the Spring '09 term at Simon Fraser.

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sensation lecture - Sensation Jamal Mansour...

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