PSYCH 2E03 Chapter 1: Topic 2 - Measuring Perception & Sensory Processes
5 Dec 2016
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** has to do with the just noticeable difference as a psychological constant in terms of threshold and perception. Magnitude estimation and the power law (s. s stevens) * magnitude estimation: subjects provide direct rating of their sensations > scaling. Where k" is the scaling constant and b" is the exponent. Different sensory experiences are relate to stimulus intensity by a particular exponent. * sensory transducer theory: the notion that transduction of the physical stimulus into a biological stimulus is the basis of the power law. * the power law is related to sensory transduction mechanism. ** now a days, this is not an exact explanation for measuring sensation. But the theory led to more detailed research based on other factors. It used to be only characterized whether a stimulus was there and affecting the threshold or not. Now studies are showing that there are other factors involved.
