PSY 1101 Chapter Notes - Chapter 5: Opponent Process, Oval Window, Psychophysics
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PSY 1101 Full Course Notes
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May see all features of a face but unable to recognize the face: psychophysics is the study of relationships between the physical characteristics of stimuli. Absolute thresholds: minimum stimulation necessary to detect a particular light, sound, pressure, taste, or odour. Is the minimum difference a person can detect between any two stimuli half the time. Increases with the magnitude of the stimulus: weber"s law, constant proportion of the original stimulus where we can detect a change, 2% for weight, 8% for light, . 3% for tones. It enables us to focus on informative changes in our environment without being distracted by uninformative constant stimulation: we perceive the world not as it is, but as it is useful for us to perceive it. Circumventing sensory adaption: 2 reasons where sensory adaptation is prevented: pain, one"s eye movement, if brain did not stop sensory adaptation, we could see motionless objects. Vision: transduction is the conversion of one form of energy into another.
