sensation and perception. definitions sensation: the process in which our sensory receptors and...
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SENSATION AND PERCEPTION
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DEFINITIONS
Sensation: the process in which our sensory receptors and nervous system receive and represent stimulus energies from our environment
Perception: the process of organizing and interpreting sensory information, enabling us to recognize meaningful objects and events
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THRESHOLDS
Absolute threshold: the minimum stimulation needed to detect a particular stimulus 50 percent of the time
Subliminal: below one’s absolute threshold for conscious awareness
Difference threshold: the minimum difference between two stimuli required for detection 50 percent of the time
Webster’s Law: the principle that, to be perceived as different, two stimuli must differ by a constant minimum percentage (rather than a constant amount)
Sensory adaption: diminished sensitivity as a consequence of constant stimulation
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VISION
Our eyes receive light energy and transduce it into neural messages that our brain then processes into what we consciously see.
Two physical characteristics of light are the wavelength – the distance from one wave peak to the next and the intensity or brightness/energy of the light waves
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THE EYE
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VISUAL PROCESSING
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HEARING
Our audition or hearing is very adaptive
The physical characteristics of sounds are its frequency of waves and the pitch of the sound
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THE EAR
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AUDIO PROCESSING
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TOUCH
Skin sensations vary into four groups – pressure, warmth, cold, and pain
Kinesthesis: the system for sensing the positions and movement of our individual body parts
Vestibular sense: the sense of body movement and position, including balance
http://www.youtube.com/watch?v=sxwn1w7MJvk
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TASTE
Basic tastes are: sweet, salty, sour, bitter
Sensory interaction includes smell plus texture equals flavor
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TASTE ZONES
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SMELL
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HOW SENSES GO WITH PERCEPTION
http://www.youtube.com/watch?v=4OelrPzpQ6Q
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VIDEOS
http://www.youtube.com/watch?v=zNbF006Y5x4&playnext=1&list=PLBAA093DAADDF09A6&feature=results_main
Your senses concluding assumption
http://www.youtube.com/watch?v=hCV2Ba5wrcs Perception explained