Analyzing Multivariate Repeated Measures Designs: A Comparison of Two Approximate Degrees of Freedom Procedures.

@article{Lix2003AnalyzingMR,
  title={Analyzing Multivariate Repeated Measures Designs: A Comparison of Two Approximate Degrees of Freedom Procedures.},
  author={Lisa M. Lix and James Algina and H. J. Keselman},
  journal={Multivariate behavioral research},
  year={2003},
  volume={38 4},
  pages={403-31}
}
The approximate degrees of freedom Welch-James (WJ) and Brown-Forsythe (BF) procedures for testing within-subjects effects in multivariate groups by trials repeated measures designs were investigated under departures from covariance homogeneity and normality. Empirical Type I error and power rates were obtained for least-squares estimators and robust estimators based on trimming/Winsorization. The BF and WJ procedures with least-squares estimators produced comparable Type I error rates for the… CONTINUE READING

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