Proposals for the Study of Anomalous Perceptual Schemata

In this paper a distinction is made between stimulus-bound processes and descriptive processes. It is suggested that the processes underlying adaptation to prismatic displacement are partly stimulus bound, but that they also involve changes in centrally evoked schemata or descriptive processes. In any case, the general procedure of confronting a person with the consequences of discordant inputs can be generalized to the study of descriptive perceptual processes. A concept of the ideal perceiver, based on the mathematical idea of the group of transformations, is defined and some examples of perceptual descriptive processes or schemata are given that illustrate how the general confrontation procedure may be applied.