PSY 1113 Lecture Notes - Lecture 4: Synesthesia, Absolute Threshold
17 Sep 2016
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Sensation: the activation of sense organs by a stimulus. > light waves, sound waves, skin pressure. ( it"s 70* degrees in this room. ) Perception: the interpretation, analysis, and integration of stimuli. > assigning meaning. ( it"s hot in this room. ) Synesthesia: a neurologically based condition in which stimulation of one sensory or cognitive pathway leads to automatic, involuntary experiences in a second sensory or cognitive pathway. (associating a letter with a color, a color with a taste) Top-down processing: using an understanding of the big picture to reason about the individual pieces. (you have the picture to the puzzle. ) Bottom-up processing: using individual pieces of information to make sense of the big picture. (you don"t have the picture to the puzzle. ) Absolute threshold: the smallest intensity of a stimulus that must be present in order for it to be detected 50% of the time.
