ERIC Number: EJ689395
Record Type: Journal
Publication Date: 2005-Jun
An Approach to Ancova that Allows Multiple Covariates, Nonlinearity, and Heteroscedasticity
Wilcox, Rand R.
Educational and Psychological Measurement, v65 n3 p442-450 Jun 2005
It is known that nonnormality, a heteroscedastic error term, or a nonlinear association can create serious practical problems when using the conventional analysis of covariance (ANCOVA) method. This article describes a simple ANCOVA method that allows heteroscedasticity, nonnormality, nonlinearity, and multiple covariates. When standard assumptions are met, all indications are that the power of the proposed method compares very favorably with that of the conventional technique.
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Publication Type: Journal Articles; Reports - Descriptive
Education Level: N/A
Authoring Institution: N/A