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We previously reported a case study of a man with right-frontal lobe damage, BG, who showed extraordinarily high false alarm rates on remember-know recognition tests. Experiment 1 extends his high false alarm rate to yes-no recognition tests. BG typically gives false "remember" responses on remember-know tests, and this pattern was uninfluenced when he was asked to explain the basis for his "remember" responses (Experiments 2 and 3). When BG was given a semantic encoding task, he stopped giving "remember"-based false alarms (Experiment 4). Signal detection analyses revealed that BG had a discrimination deficit and an abnormally liberal response bias (especially for "remember" responses) in most conditions. Overall, BG's high false alarm rate is interpreted as reflecting an over-reliance on the general similarity between a test item and the study episode. |
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Contact Professor Ken Norman: knorman@princeton.edu Home
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