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Download full textBarnette, J. Jackson; McLean, James E. – 1999
Four of the most commonly used multiple comparison procedures were compared for pairwise comparisons and relative to control of per-experiment and experimentwise Type I errors when conducted as protected or unprotected tests. The methods are: (1) Dunn-Bonferroni; (2) Dunn-Sidak; (3) Holm's sequentially rejective; and (4) Tukey's honestly…
Descriptors: Comparative Analysis, Monte Carlo Methods, Research Methodology, Selection
Barnette, J. Jackson; McLean, James E. – 1998
Conventional wisdom suggests the omnibus F-test needs to be significant before conducting post-hoc pairwise multiple comparisons. However, there is little empirical evidence supporting this practice. Protected tests are conducted only after a significant omnibus F-test while unprotected tests are conducted without regard to the significance of the…
Descriptors: Comparative Analysis, Monte Carlo Methods, Research Methodology, Sample Size
Barnette, J. Jackson; McLean, James E. – 1998
Tukey's Honestly Significant Difference (HSD) procedure (J. Tukey, 1953) is probably the most recommended and used procedure for controlling Type I error rate when making multiple pairwise comparisons as follow-ups to a significant omnibus F test. This study compared observed Type I errors with nominal alphas of 0.01, 0.05, and 0.10 compared for…
Descriptors: Comparative Analysis, Error of Measurement, Monte Carlo Methods, Research Methodology
