Accurate Confidence and Bayesian Interval Estimation for Non-centrality Parameters and Effect Size Indices.
Accurate Confidence and Bayesian Interval Estimation for Non-centrality Parameters and Effect Size Indices.
复制标题
非中心参数和效果大小指数的准确置信度和贝叶斯间隔估计。
DOI:
10.1007/s11336-022-09899-x
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发表时间:
2023-03
期刊:
影响因子:
3
通讯作者:
Vandekar, Simon
中科院分区:
文献类型:
--
作者:
Kang, Kaidi;Jones, Megan T.;Armstrong, Kristan;Avery, Suzanne;McHugo, Maureen;Heckers, Stephan;Vandekar, Simon
关键词:
Reporting effect size index estimates with their confidence intervals (CIs) can be an excellent way to simultaneously communicate the strength and precision of the observed evidence. We recently proposed a robust effect size index (RESI) that is advantageous over common indices because it’s widely applicable to different types of data. Here, we use statistical theory and simulations to develop and evaluate RESI estimators and confidence/credible intervals that rely on different covariance estimators. Our results show (1) counter to intuition, the randomness of covariates reduces coverage for Chi-squared and F CIs; (2) when the variance of the estimators is estimated, the non-central Chi-squared and F CIs using the parametric and robust RESI estimators fail to cover the true effect size at the nominal level. Using the robust estimator along with the proposed nonparametric bootstrap or Bayesian (credible) intervals provides valid inference for the RESI, even when model assumptions may be violated. This work forms a unified effect size reporting procedure, such that effect sizes with confidence/credible intervals can be easily reported in an analysis of variance (ANOVA) table format. The online version contains supplementary material available at 10.1007/s11336-022-09899-x.
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