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Enduring Issues in Sensation and Perception Lecture Notes

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Enduring Issues in Sensation and Perception - Person - Situation: To what extent do our perceptual experiences accurately reflect what is in the outside world? - Nature - Nurture / Stability - Change: In what ways do our experiences of the outside world change as a result of experience over the course of our lives? - Diversity - Universality: To what extent do people around the world perceive events in the same way? - Mind - Body: In what ways do our experiences depend on biological processes? The nature of Sensation - Sensation: Occurs when energy from an external or internal source stimulates a receptor cell in one or more sense organs - Receptor Cell: a specialized cell that responds to a particular type of energy - Transduction: the conversion of physical energy into coded neural signals ***Receptor cells and transduction causes Sensory Experiences Doctrine of Specific Nerve Energies→ the one-to-one relationship between stimulation of a specific nerve and the resulting sensory experience Sensory Thresholds - Absolute Thresholds: the smallest amount of energy needed for conscious detection of a stimulus at least half the time it is present - Difference Threshold: Smallest change in stimulation that can be detected 50% of the time - Producing a jnd for sound requires a 0.3% change. - Producing a jnd for taste requires a 20% change. - Producing a jnd for weight requires a 2% change. - Weber’s Law: The principle that the IND for any given sense is a constant fraction or p ...
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