PSYCHOPHYSICAL EXPERIMENTS AND PERCEPTUAL SITUATIONS
According to a widely accepted view, our percepts of the â€˜external worldâ€™ consist of â€˜sensationsâ€™, which are mental counterparts of physical properties of the perceived objects. Fechnerâ€™s notion of â€˜measurement of sensationsâ€™ is compatible with this view. We propose a re-interpretation based on our concept of psychophysics as a science of â€˜primary experienceâ€™. Psychophysical experi- ments are then understood as perceptual situations, consisting of a construction (apparatus) and an instruction given to the subject. â€˜Sensationsâ€™ are conventional indices for classes of perceptu- ally equivalent configurations (states of the apparatus), where the equivalence relation is specified by the instruction. In this account, the locus of the measured is in the inter-subjectively shared, commonly accessible, that is, communicable worldâ€”not inside the subjectâ€™s mind.