Shreiner S C
Int J Addict. 1980 Aug;15(6):915-20. doi: 10.3109/10826088009040066.
This research note compares the phi, kappa, and G measures of association and agreement used to estimate the reliability of drug and alcohol self-report data in the 2 x 2 case. Attention is focused upon the problems encountered in using these measures when skewed marginal distributions are found in a test-retest situation. The G index of agreement was found to be a stable estimator, unaffected by skewed marginals, and equivalent to kappa and phi when marginal distributions are equal.
本研究报告比较了用于估计2×2情况下药物和酒精自我报告数据可靠性的关联度和一致性的phi、kappa和G度量。重点关注在重测情况下发现边际分布偏斜时使用这些度量所遇到的问题。发现一致性G指数是一个稳定的估计量，不受边际偏斜的影响，并且当边际分布相等时与kappa和phi等效。
