9-18 notes - 9/18/08 CHAPTER 4: SENSATION AND PERCEPT ION...

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Unformatted text preview: 9/18/08 CHAPTER 4: SENSATION AND PERCEPT ION Sensation: the stimulation of the sense organs Perception: the process of organizing and interpreting sensory information Sensory deprivation- take a person and make it so they dont get any information from their senses. Theyre put in a sensory deprivation tank filled with water, pitch black, sound proof, water is same temp as body temp. People begin to hallucinate, feel anxious, nervous, or bizarre thoughts (torture). Sensation Absolute threshold: the lowest intensity at which participant notices stimuli 50% of the time. Difference threshold (aka the just noticeable difference): smallest difference between two stimuli that is needed for a person to notice 50% of the time. Sensory adaptation: diminished sensitivity to unchanging stimulus. Happens in all of our senses. Notice less in vision. Sensory Systems: Vision Stimulus=light waves Sense organ=the eye Pupil: adjustable opening in the center of the eye Cornea: protective covering that covers the eye I ris: ring of muscle around pupil that forms colored part of eye and controls size of pupil....
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9-18 notes - 9/18/08 CHAPTER 4: SENSATION AND PERCEPT ION...

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