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ROCs in recognition with and without identification

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Receiver operating characteristics (ROCs) for the recognition of unidentified word fragments were analysed and compared with ROCs for the recognition of identified word fragments. In all conditions reported here, the z ‐transformed ROCs ( z ‐ROCs) for recognition without identification were linear, with slopes near 1.0. In contrast, the z ‐ROCs for recognition with identification each had both a linear and a quadratic component, and a slope of substantially less than 1.0. Because the recognition of unidentified word fragments likely results from a familiarity process, the present study examined how well the effect can be explained by global matching variants of signal detection theory. Global matching models predict that memory should be better for strong items from a mixed list than for strong items from a pure list, and should be worse for weak items from a mixed list than for weak items from a pure list; however, only the latter pattern was shown for the recognition of unidentified items.
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Document Type: Research Article

Affiliations: Iowa State University, Ames, IA, USA

Publication date: January 1, 2005

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