Furey A M, Kowalski C J, Schneiderman E D, Willis S M
Department of Biostatistics, University of Michigan, Ann Arbor 48109.
Int J Biomed Comput. 1994 Aug;36(4):311-8. doi: 10.1016/0020-7101(94)90085-x.
This paper reviews Goldstein's 'growth constancy index,' Xi, a measure of tracking which can be used to determine whether or not individuals maintain their relative positions in the distribution of a given measurement as that distribution changes over time. We suggest that Xi is an appropriate measure of tracking when the (standardized) measurements arise in the context of a Model I ANOVA, but that the intraclass correlation coefficient, rI, may be preferred when a Model II ANOVA is applicable. We also describe--and make available--a PC program which allows the user to choose between Model I and Model II, and computes the appropriate tracking index and confidence intervals for the corresponding parameter.
本文回顾了戈尔茨坦的“生长恒定指数”Xi，这是一种追踪度量，可用于确定随着给定测量的分布随时间变化，个体是否在该分布中保持其相对位置。我们认为，当（标准化）测量值出现在I型方差分析的背景下时，Xi是一种合适的追踪度量，但当适用II型方差分析时，组内相关系数rI可能更受青睐。我们还描述了一个PC程序（并提供该程序），该程序允许用户在I型和II型之间进行选择，并计算相应参数的合适追踪指数和置信区间。
