[An analysis of the "same-different" judgment process in the color and form multidimensional stimulus (author's transl)].

The "same-different" judgment process was investigated using the colon and form multidimensional stimuli. "Same-different" reaction time paradigm was employed in which the stimulus was sequentially presented. Exp. I was designed to clarify the processing mechanism of the "different" judgment. The results suggested that the "different" response was initiated by the processing of each dimension. In Exp. II, the dimensions of the first stimulus were separated and sequentially presented. It was found that the RT for the separated presentation was shorter than that for the composed presentation in Exp. I. The results suggested that the hypothesis of parallel matching based on dimensions was enough to explain the RT of the "same" response. Based on the results of Exp. I and Exp. II, the sequential-dual process model was proposed.