A Psychophysical Approach to Dimensional Integrality
MICHIGAN UNIV ANN ARBOR HUMAN PERFORMANCE CENTER
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The paper defines dimensional integrality and presents a theory of integrality that explains the manner and conditions under which integrality operates. Integrality is defined as a property of the mapping of a physical specification of complex stimulation into the multi-dimensional psychological characteristics of the stimulation as perceived. An experiment is presented that test this notion of integrality as psychophysical compatibility. Two qualitatively different types of multi-dimensional scaling solutions obtain for pair-wise similarity judgments of two sets of triangles. Both sets of stimuli are defined by two physically orthogonal dimensions, but in one set the physical specification is incompatible with the perceived characteristics, and in the other set the physical specification is compatible with the perceived characteristics. This definition of integrality is validated against data obtained from standard information processing tasks involving speeded classification.