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The study of capacity, empirically and theoretically, is of considerable impor tance in cognitive psychology (see, e.g., Kahneman, 1973; Townsend, 1974a). Yet there are relatively few mathematical techniques within psychology designed to assess or analyze capacity, much less a systematic theory that interrelates the various and sundry uses of the concept.
Townsend et al. (Tue,) studied this question.