"Ch5-Student

"Ch5-Student - Chapter 5 Sensation and Perception...

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Chapter 5 Sensation and Perception Sense Organs * Sense Organs : organs that receive stimuli * Sensory Receptor Cells: specialized cells within the sense organs that send neural impulses to the brain Sensation Vs. Perception * Sensation: information coming into your brain * Perception: organizing and interpreting the information * Example: your ear receives a stimulus in the form of sound waves, you perceive that your favorite song is on the radio Sensory Limits (thresholds) * Absolute Threshold: the smallest magnitude of a stimulus that can be detected (the weakest detectable stimulus) Vision: a candle flame seen at 30 miles on a clear, dark night Hearing: The tick of a watch under quiet conditions at 20 feet Taste: One teaspoon of sugar in 2 gallons of water Smell: One drop of perfume diffused into the entire volume of a 3-room apartment Touch: The wing of a bee falling on your cheek from a height of 1 cm * Difference Threshold: the smallest detectable difference between two stimuli
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Sensory Limits Continued * Weber’s Law: * The Difference Threshold between two things depends on the strength of the original stimulus (the stronger the original stimulus, the bigger the changes must be in order for them to be noticed, yet changes in weak stimuli are very noticeable) Eg. 100lbs, add 2 lbs 10 lbs, add 2 oz * Sensory Adaptation: the perceived weakening of a sensation due to prolonged exposure to the stimulus * Example: when you jump into cold water at first you feel freezing, but after a few moments, the water does not feel as cold (sensory receptors are fatigued and do not detect the stimulus as strong as they first did) Vision * Must have light to see Light is composed of waves that give us: * Hue: of light gives us color * Brightness: of light * Saturation: of light (gives us pure versus paler colors) Human Visual Spectrum: ROY G. BIV
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Parts of the Eye * Cornea : coating on the surface of the eye * Iris : colored part of the eye that regulates the amount of light that enters * Pupil
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This note was uploaded on 04/08/2011 for the course PSYC 100 taught by Professor Lebrenton during the Spring '11 term at BYU.

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"Ch5-Student - Chapter 5 Sensation and Perception...

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