![]() Planned t-tests can be conducted instead of an Anova (or even notwithstanding a 'non-significant' Anova F value) by virtue of their having been planned prior to collecting the data in that experiment or study. Technically, planned tests (or the use of planned contrasts) are not "follow-up" tests that are done following a 'significant' omnibus F value from an Anova. Section 3.3.8.4: Planned contrasts for within subjects ANOVA (71-71).Section 3.3.6.1: Post hoc tests and planned contrasts (61-63).Francis (Introduction to SPSS for Windows):. ![]() Howell (Statistical Methods): Chapter 12: Multiple comparison among treatment means (343-389).Section 16.5: Multiple comparison procedures (375-383).Chapter 9.4.3 Follow up analyses (One-way repeated measures ANOVA).Chapter 8.4.2 Follow up analyses (Factor between groups ANOVA Example 2).Chapter 7.4.3 Follow up analyses (One-way ANOVA Example 2).Chapter 7.3.3 Follow up analyses (One-way ANOVA Example 1).Allen & Bennett (SPSS for the health and behavioural sciences):.To learn more about conducting follow-up tests for ANOVA, consult: There are two types of follow-up tests: planned contrasts (when you have hypothesised specific group comparisions) and post hoc tests (when you haven't hypothesised specific differences - tests all pairs of groups). 4 A statistically more powerful alternative.
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