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psych unit 4

perception

TermDefinition
perception select, organize, and interpret our sensations
bottom up processing analysis begins with the sense receptors and works up to the level of the brain and mind
top down processing information processing guided by higher level mental processes, drawing on experience and expectations
selective attention perception about objects change from moment to moment
inattentional blindness inability to see an object or a person in our midst
change blindness inattentional blindness
pop out distinct stimulus that automatically draws our eye
overt pointing sensory systems at a particular stimulus
covert shifting attention without the appearance of shifting the sensory system
phototransduction conversion of light energy into neural impulses that the brain can understand
absolute threshold minimum stimulation needed to detect a particular stimulus 50% of the time
subliminal threshold when stimuli are below one's absolute threshold for conscious awareness
the priming effect the activcation, unconsciously, of associations that predispose one's perception, memory, or response
difference threshold minimum difference between two stimuli required for detection 50% of the time, also called "just noticeable difference"
wber's law two stimuli must differ by a constant minimum percentage to be perceived as different. light-8 weight-2 tone-.3
signal detection theory there is no absolute threshold
sensory adaptation diminished sensitivity as a consequence of constant stimulation (unchanging stimulus)
Created by: brancnj
 

 



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