nif:isString
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The probability that a changed item is not held in memory, no change is perceived but the observer guesses that there was a change, and the identity of the changed item is correctly guessed is N−kNrkt1N−k The correct identification rate for hits is therefore given by HID=1H(d−2+r(d−1)N1−rk1−r+rktN) Where a change is missed, the identity of the changed item is guessed at from the set of items not held in memory.
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