| Sumario: | A study was conducted to examine data from a fundamental cognitive task in which subjects differentiate the relative frequency of visual or auditory binary stimuli. A number of models was examined, using multiple comparisons between response patterns of individual and pooled participants and predictive measures taken from simulations for each trial sequence. Findings indicate a reinterpretation of memory capacity and support a new type of model, with a single estimable parameter, in which specific, valued units of information are stochastically supplanted by further input. Implications for theoretical explanations of short-term memory, discrimination, and absolute judgment, as well as the assessment of individual differences in cognitive ability, are considered.
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