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Memory & Cognition
Psychometric functions and the associated indices of discriminative performance (i.e., the point of subjective equality [PSEl, just noticeable difference, and Weber fraction) were obtained with the method of constant stimuli using perceptual and remembered line-length standards. Three important results were obtained. First, comparisons with a perceptual or a remembered standard were sensitive to variations of absolute stimulus differences with a common ratio; that is, Weber's law was violated.doi:10.3758/bf03199662 pmid:1508051 fatcat:u5njtkz37rh4bdrjacm5i4ih3e