Nichol C R, Turner C G
Am J Phys Anthropol. 1986 Mar;69(3):299-315. doi: 10.1002/ajpa.1330690303.
A sample of 50 Kodiak Island Eskimo dental casts were observed, using standard reference plaques, three times by one observer and once by a second observer, for 47 graded and discrete morphological characters of the dentition and jaws. Although the frequency of both intra- and interobserver scoring differences between observation sessions are relatively high for some characters, statistical analysis reveals that differences are largely random in direction and cancel out. Most dental morphological variants can be observed in a ranked fashion with adequate within- and between-observer reliability. However, four traits present both within- and between-observer difficulties: the tuberculum dentale, the canine distal accessory ridge, marginal accessory cusps of the upper first premolar, and the anterior fovea on the lower first molar.
观察了50个科迪亚克岛爱斯基摩人的牙模样本，由一名观察者使用标准参考菌斑对牙列和颌骨的47个分级和离散形态特征进行了三次观察，另一名观察者进行了一次观察。尽管某些特征在观察期间观察者内部和观察者之间评分差异的频率相对较高，但统计分析表明，差异在方向上大多是随机的且相互抵消。大多数牙齿形态变异可以以一种有等级的方式被观察到，观察者内部和观察者之间具有足够的可靠性。然而，有四个特征在观察者内部和观察者之间都存在困难：齿突、犬齿远中副嵴、上颌第一前磨牙的边缘副尖以及下颌第一磨牙上的前凹。
