
Contents
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6.1 THE POWER LAW AS A PROPERTY OF PRIMARY NEURAL RESPONSE 6.1 THE POWER LAW AS A PROPERTY OF PRIMARY NEURAL RESPONSE
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6.1.1 Primary neural response to taste 6.1.1 Primary neural response to taste
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6.1.2 Primary neural response to touch 6.1.2 Primary neural response to touch
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6.2 THE POWER LAW AS A FUNCTION OF UNSPECIFIED PHYSIOLOGICAL PROCESSES 6.2 THE POWER LAW AS A FUNCTION OF UNSPECIFIED PHYSIOLOGICAL PROCESSES
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6.2.1 The precision of estimates of the Power Law exponent 6.2.1 The precision of estimates of the Power Law exponent
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6.2.2 Veridical estimation of stimulus magnitude 6.2.2 Veridical estimation of stimulus magnitude
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6.3 DIFFERENTIAL COUPLING OF SENSORY MAGNITUDES 6.3 DIFFERENTIAL COUPLING OF SENSORY MAGNITUDES
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6.3.1 The Craik–Cornsweet illusion 6.3.1 The Craik–Cornsweet illusion
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6.3.2 Crovitz's illusion 6.3.2 Crovitz's illusion
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6.3.3 MacKay's illusion 6.3.3 MacKay's illusion
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6.3.4 The Rawdon-Smith illusion 6.3.4 The Rawdon-Smith illusion
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6.3.5 Shepard's circular pitch paradox 6.3.5 Shepard's circular pitch paradox
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6.3.6 The taste of water 6.3.6 The taste of water
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6.3.7 Simultaneous contrast 6.3.7 Simultaneous contrast
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6.3.8 Land's phenomenon 6.3.8 Land's phenomenon
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6 The physiological basis of sensation
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Published:June 1997
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Abstract
This chapter examines the hypothesis that the power law transform is realized in elementary neural function. It begins by examining studies that have looked for power law relationships between stimulus magnitude and the frequency of discharge in primary neural response. Physiological responses do not correlate well with magnitude estimates, and the electrophysiological data tell us nothing. The idea that sensation is related in some simple manner to physiological function meets further difficulty in the variability of independent estimates of the power law exponent, chiefly for 1000 Hz tones; and there are some participants who do not give power law estimates, but veridical estimates instead. Finally, there are sensory illusions that are intelligible only on the basis that perception is differentially coupled to the stimulus. Differential coupling precludes any direct relationship with sensation.
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