Abstract
The construction of an interval scale by equisection methods requires only that the subject partition a segment of a “physical” continuum into “subjectively equal” intervals with respect to the psychological attribute which is being scaled. Although many investigators have used these methods to construct scales, interest has focused primarily on problems connected with the psychophysical law. Here attention is devoted to tests of the validity of the constructed scale by providing an analysis that makes explicit those assumptions implicit in the use of equisection scaling methods.
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