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Chapter 5

Nov 12th - Chapter 5 Sensation&Perception Textbook Notes.docx

4 Pages

Course Code
Psychology 1000
Laura Fazakas- De Hoog

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SensationPerception th November 12Describe the 5 stages that constitute the process of sensory processingperception of information 1Stimulus is received by sensory receptors2Receptors translate stimulus properties into nerve impulses transduction3Feature detectors analyze stimulus features4Stimulus features are reconstructed into neural representation5Neural representation is compared with previously stored information in brain recognition interpretation of stimuli Distinguish between sensation and perception Sensationis the stimulusdetection process by which our sense organs respond to and translate environmental stimuli into nerve impulses that are sent to the brain Perceptionmaking sense of what our senses tell usis the active process or organizing this stimulus input and giving it meaning What are two kinds of sensory capabilities Absolute limits of sensitivityEg What is the softest sound or the weakest salt solution that humans can detect Differences in stimuliEg What is the smallest difference in brightness that we can detect how much difference must there be in two tones before we can tell that they are not identical Absolute Thresholdthe lowest intensity at which a stimulus can be detected correctly 50 percent of the time Thus the lower the absolute threshold the greater the sensitivity What kinds of personal and situational factors influence signal detection decision criteria Decision criteriaa standard of how certain they must be that a stimulus is present before they will say they detect it The decision criteria can change depending on factors like fatigue expectation and personal significance of the stimulus Difference thresholdthe smallest difference between two stimuli that people can perceive 50 percent of the time The difference threshold is sometimes called the just noticeable difference jnd
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