Processing of geometrical dimensions in a binary classification task: Evidence for a dual process model |
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Authors: | P. J. G. Keuss |
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Affiliation: | 1. Department of Psychology, Free University, Provisorium, De Boelelaan 1115, Amsterdam, The Netherlands
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Abstract: | Confirming the findings in search tasks with letters and digits, the typical RTsame < RTdiff result was obtained in a matching paradigm requiring the classification of geometrical stimuli that were given in pairs. The study supports a dual process model that is based on an identity reporter for the faster “same” response and a difference detector for the slower “different” responses, both operating with equal accuracy. Subjects appeared to perceive outline aspects of figures, formed by size and form, holistically. An internal characteristic, such as an interior line, was apparently processed as a separate attribute. However, the outlines of the stimulus configurations appeared to be much more salient and interfered with the judgment of the orientation of the interior line. Moreover, the latter stimulus aspect could be easily ignored as the task required. |
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