Lees F C, Byard P J
Am J Phys Anthropol. 1978 May;48(4):515-21. doi: 10.1002/ajpa.1330480411.
Comparisons between skin colorimetry reports have been hampered by the common use of two different types of portable reflectometers, which sample reflectances at different wavelengths. In an attempt to provide direct comparability between the two machines, multiple linear regression equations were derived from reflectance spectrophotometry readings on 308 Black Caribs and 175 Creoles in Belize, Central America, using both machines. Cross validation tests show the coefficients presented are applicable to independent data sets and generally applicable to other heavily pigmented populations. Comparisons with previously published conversion formulae, which were from very small samples using simple linear regression, show a definite improvement in predictive accuracy when using multiple regression equations based on a large sample.
皮肤比色计报告之间的比较受到阻碍，因为通常使用两种不同类型的便携式反射仪，它们在不同波长下采样反射率。为了使这两种仪器能够直接进行比较，利用这两种仪器对中美洲伯利兹的308名黑加勒比人和175名克里奥尔人的反射分光光度读数推导出了多元线性回归方程。交叉验证测试表明，所给出的系数适用于独立数据集，并且通常适用于其他色素沉着较重的人群。与之前发表的基于非常小的样本使用简单线性回归的转换公式相比，使用基于大样本的多元回归方程时，预测准确性有了明显提高。
