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Signal Detection Theory and Psychophysics - Andrei Gorea

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Criterion settingObservers set a criterion that attempts to minimize the total errorrate (pMiss + pFA).xFor equally probable <strong>Signal</strong> <strong>and</strong> Noise, choose S <strong>and</strong> not N whenp(x|S) > p(x|N)i.e. when the likelihood ratio = p(x|S) / p(x|N) > 1For unequal probabilities of S <strong>and</strong> N, p(S) <strong>and</strong> p(N), optimal p(N) / p(S)

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