Bootstrap methods for comparing independent regression slopes.
Title | Bootstrap methods for comparing independent regression slopes. |
Publication Type | Journal Article |
Year of Publication | 2012 |
Authors | Ng, Marie, and Wilcox Rand R. |
Journal | The British journal of mathematical and statistical psychology |
Volume | 65 |
Issue | 2 |
Pagination | 282-301 |
Date Published | 2012 May |
ISSN | 2044-8317 |
Abstract | In this study, we explore the effects of non-normality and heteroscedasticity when testing the hypothesis that the regression lines associated with multiple independent groups have the same slopes. The conventional approach involving the F-test and the t-test (F/t approach) is examined. In addition, we introduce two robust methods which allow simultaneous testing of regression slopes. Our results suggest that the F/t approach is extremely sensitive to violations of assumptions and tends to yield misleading conclusions. The new robust alternatives are recommended for general use. |
DOI | 10.1111/j.2044-8317.2011.02024.x |
Alternate Journal | Br J Math Stat Psychol |