Abstract

Two Os made identifications and certainty ratings for five Canadian traffic signs under a theory of signal detectability confidence-rating paradigm. The data showed a strategy from the theory of signal detection for the task as a whole but not for each separate target. Rather than referring to five separate signal and noise distributions, Os apparently used a single-decision axis for their judgments. This outcome suggests the need for clarification of the meaning of individual d' values obtained by a multi-target confidence-rating procedure, based on theory of signal detectability.

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