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Reliability of a method to measure novelty‐seeking in nonhuman primates

The objective of this study was to create a reliable method to measure novelty‐seeking (NS) temperament in stumptailed macaques. We correlated two behavioral indexes (risk‐taking and curiosity) with the NS index. Cochran's concordance index yielded ethogram reliability (risk: α = 0.88; curiosity: α = 0.79). Risk and curiosity indexes were obtained with a synthetic index obtainment approach. Intraclass correlation of the instrument yielded a value of 0.88. Temperament index was established from the average score given by each judge. The instrument presented 92% specificity and 70% sensitivity, with a 56‐point score taken as the cuttoff point to classify individuals. The results of a Spearman's analysis of the three indexes were significant (temperament‐risk, n = 32, P<0.01; temperament‐curiosity, n = 29, P<0.05; risk curiosity, n = 29, P<0.05). We conclude that the method we developed is reliable. Am. J. Primatol. 68:1098–1113, 2006. © 2006 Wiley‐Liss, Inc.