Abstract
An analysis of the general principles of the organization of analyzers as systems consisting of detectors shows that in such a system a stimulus may be presented as an n-dimension vector whose components are the respective excitations in selected detectors. Then the difference between two stimuli is defined by the angle between the two vectors representing them. Accordingly, the whole range of stimuli that neurons are able to discriminate may be plotted on an n-dimension sphere [4]. If we assume that for some stimuli, the difference discriminable by neurons will be directly correlated with the magnitude of the subjective difference between the stimuli, the assessment of the difference between two stimuli in a psychophysical experiment may be regarded as an arc on an n-dimension sphere of constant radius.
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