The Measurement of Sensation (Oxford Psychology Series) by Donald Laming

By Donald Laming

S. S. Stevens' recognized paper On the Psychophysical Law, released in 1957, ignited an argument that maintains to this day--how to competently degree sensation. for instance, how can the notion of sensation diverge so sharply from the significance of the stimulus? How should still or not it's measured? This ebook deals a concise yet specified advent to the problems coming up from this controversy. It provides an important arguments within the box, plus a entire survey of the knowledge to permit readers to shape their very own reviews at the debate.

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The dependence of observation on context does not, of itself, preclude valid measurement; it merely means that context has to be controlled. But we can know about internal Perception without sensation' 17 sensations only through the medium of judgments made by experimental subjects. The examples just cited suggest that identification of the stimulus as an object is primary and the judgment of sensation derived therefrom. This raises the critical question whether 'sensation' can be defined in a way that is independent of the object from which it is abstracted.

6 P R I O R E X P E C T A T I O N S Hollingworth (1909) reported this experiment on the reproduction of guided movements. A narrow slit of the required length was cut in a strip of cardboard which was then pasted onto a similar strip to form a furrow. This furrow could be readily traced with a pencil held by a blindfolded subject. e. with no furrow to guide him) and two seconds later a second reproduction. Different prescribed amplitudes were presented in random order, each followed by two reproductions, until a total of 50 reproductions of each standard amplitude had been recorded.

286. © 1988, Cambridge University Press. ) At a greater distance, the harmonic components producing those diagonal grey lines are sufficiently far below threshold that the defect thereby created becomes itself imperceptible. (As distance increases, so also do the wavenumbers of individual sinusoidal components. ) At that greater distance certain other harmonic components, now oriented horizontally and vertically, enter the critical region of contrast where subthreshold compression takes hold, and illusory vertical and horizontal lines can be seen.

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