• Extrapyramidal signs were rated by three neurologists in 20 patients who had either been diagnosed as having probable Alzheimer's disease or who were being evaluated for dementia. In general, good inter-rater reliability was found for the presence or absence of extrapyramidal signs, although agreement over the presence of some signs was reduced when distinctions between normality and slight departures from normality were required.
Richards M, Marder K, Bell K, Dooneief G, Mayeux R, Stern Y. Interrater Reliability of Extrapyramidal Signs in a Group Assessed for Dementia. Arch Neurol. 1991;48(11):1147–1149. doi:10.1001/archneur.1991.00530230055021
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