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Comparing the regression slopes of independent groups

Author: Marie Ng and Rand R. Wilcox

Source: British Journal of Mathematical and Statistical Psychology

Publisher: British Psychological Society

Abstract:

In this study, we explore the effects of non-normality and heteroscedasticity when testing the hypothesis that regression lines associated with two independent groups have the same slopes. Our results indicate that some recently proposed methods that allow heteroscedasticity and perform well in extant simulation studies do not perform well for the situation at hand. Two of the methods studied here are recommended for general use.

Document Type:

DOI: 10.1348/000711009X456845

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