How many discoveries have been lost by ignoring modern statistical methods?

Journal/Book: Amer Psychol. 1998; 53: 750 First St NE, Washington, DC 20002-4242. Amer Psychological Assoc. 300-314.

Abstract: Hundreds of articles in statistical journals have pointed out that standard analysis of variance, Pearson product-moment correlations, and least squares regression can be highly misleading and can have relatively low power even under very small departures from normality In practical terms, psychology journals are littered with nonsignificant results that would have been significant if a more modern method had been used. Modern robust techniques, developed during the past 30 years, provide very effective methods for dealing with nonnormality, and they compete very well with conventional procedures when standard assumptions are met. In addition, modem methods provide accurate confidence intervals for a much broader range of situations, they provide more effective methods for detecting and studying outliers, and they can be used to get a deeper understanding of how variables are related. This article outlines and illustrates these results.

Note: Article Wilcox RR, Univ So Calif, Dept Psychol, Los Angeles,CA 90089 USA

Keyword(s): RESIDUALS

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