HSD is a single-step procedure for all possible pairwise comparisons. A step-down procedure (such as Newman-Keuls) could also be used for pairwise comparisons, but the critical value for the largest comparison would be the same as HSD, so the result would be the same. (If the largest comparison is not significant, testing would stop.) The significant F, in the face of non-significant pairwise comparisons, suggests that some contrasts other than the pairwise contrasts would be significant. A Scheffš's test could be used to tease out the significant nonpairwise contrast(s). Michael T. Scoles, Ph.D. Associate Professor of Psychology & Counseling University of Central Arkansas Conway, AR 72035 501-450-5418
>>> "Rick Froman" <[EMAIL PROTECTED]> 4/3/2007 1:50 PM >>> How would you interpret an ANOVA result where the F-test was significant but none of the multiple comparisons were significant in an HSD comparison? Rick Dr. Rick Froman, Chair Division of Humanities and Social Sciences Professor of Psychology John Brown University 2000 W. University Siloam Springs, AR 72761 [EMAIL PROTECTED] (479) 524-7295 http://www.jbu.edu/academics/hss/faculty/rfroman.asp "Pete, it's a fool that looks for logic in the chambers of the human heart." - Ulysses Everett McGill --- To make changes to your subscription go to: http://acsun.frostburg.edu/cgi-bin/lyris.pl?enter=tips&text_mode=0&lang=english --- To make changes to your subscription go to: http://acsun.frostburg.edu/cgi-bin/lyris.pl?enter=tips&text_mode=0&lang=english
