Chapter 3Q - Chapter 3 Sensation and Perception Sensation:...

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Chapter 3 Sensation and Perception
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Sensation : Sensory receptors : specialized cells in sense organs that detect stimuli from the outside world Eyes, ears, nose etc
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Perception While our sensory receptors provide us with the raw data about the world, we still need to know what we are seeing PERCEPTION
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Absolute Threshold Point at which a person can detect stimulus 50% of the time Varies based on level and nature of ongoing sensory stimulation
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Under Ideal circumstances Vision: a candle flame, 30 miles away on a dark, clear night Hearing: a watch ticking 20 feet away in a quiet room Smell: a drop of perfume in a 6 room house Taste: a teaspoon of sugar in 2 gallons of water Touch: a wing of a fly falling on the cheek from the height of 1 centimeter
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Sensory Adaptation Ability to detect stimulus is partly dependent on sensitivity of out sensory systems. If you get in a cold pool: shocking at first, but after a bit don’t feel cold anymore
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Difference Threshold Just Noticeable Difference JND How much do things differ??? To be noticed?
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Chapter 3Q - Chapter 3 Sensation and Perception Sensation:...

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