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Chondra M. Lockwood
Researcher at Arizona State University
Publications - 8
Citations - 19896
Chondra M. Lockwood is an academic researcher from Arizona State University. The author has contributed to research in topics: Variables & CDF-based nonparametric confidence interval. The author has an hindex of 8, co-authored 8 publications receiving 17779 citations.
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A comparison of methods to test mediation and other intervening variable effects.
TL;DR: A Monte Carlo study compared 14 methods to test the statistical significance of the intervening variable effect and found two methods based on the distribution of the product and 2 difference-in-coefficients methods have the most accurate Type I error rates and greatest statistical power.
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Confidence Limits for the Indirect Effect: Distribution of the Product and Resampling Methods.
TL;DR: Two alternatives for improving the performance of confidence limits for the indirect effect are evaluated: a method based on the distribution of the product of two normal random variables, and resampling methods.
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Equivalence of the Mediation, Confounding and Suppression Effect
TL;DR: The statistical similarities among mediation, confounding, and suppression are described and methods to determine the confidence intervals for confounding and suppression effects are proposed based on methods developed for mediated effects.
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Distribution of the product confidence limits for the indirect effect: Program PRODCLIN
TL;DR: This article describes a program, PRODCLIN (distribution of the PRODuct Confidence Limits for INdirect effects), written for SAS, SPSS, and R, that computes confidence limits for the product of two normal random variables.
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The intermediate endpoint effect in logistic and probit regression
TL;DR: A limitation of a widely used approach to assessing intermediate endpoint effects is described and an alternative method, based on products of coefficients, that yields more accurate results is proposed.