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Dan Meegan (42)
Chapter 5

Chapter 5 Review

8 Pages

Course Code
PSYC 2410
Dan Meegan

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Chapter 5Sensation and PerceptionKey TermsSensation the stimulus detection process that our sensory organs use to respond to and translate a stimuli into a never impulse that can be sent to the brain Perception to rationalize what our senses tell us to organize stimuli input and give it meaningSynesthesiaa mixing of the senses for example someone hearing a sound and they will see color and get a taste in their mouthPsychophysicsan area of science that is concerned with the relations of the physical characteristics and the capabilities of senseslook at both limits ie whats the dimmest light we can see and distinguishing differences in stimuli ie what is the differences needed between tones for us to detect itAbsolute thresholdthe lowest level a stimulus can be for us to detect it correctly 50 of the timeDecision criteriona standard people have of how certain they must be of stimulus present in order to detect itSignal detection theoryfactors that influence sensory judgmentSubliminal stimulusa stimulus that is so brief or faint that even though senses receive it we do not perceive it consciously as its well below the threshold level in the use of subliminal message advertising it was found that messages that get our attention on a conscious level are MORE effective than subliminal contrary to popular beliefDifference thresholdthe lowest level of stimuli that allows a person to detect a difference between two stimuli correctly 50 of the time aka just noticeable differenceWebers lawstates that the difference threshold is proportional to the magnitude of the stimulus by which comparisons are made ie if you have 50grams you would need to hold 51g to make a comparison but if you had 500g you would need 510g to notice a difference This law breaks down at extremely high or low intensities of stimulus
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