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It has been known for over 40 years that there are two fundamentally different kinds of detection tasks in the theory of signal detectability. The Type 1 task is to distinguish between events defined independently of the observer; the Type 2 task is to distinguish between one's own correct and incorrect decisions about those Type 1 events. For the Type 1(More)
The first three authors contributed equally to this project. We thank Linton Miller for his extensive comments and valuable advice. We also thank the anonymous reviewers for their helpful comments. We also acknowledge the financial assistance of Victoria University of Wellington. Further details are available on the Internet at www.psychophysics.org.(More)
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