Field, Chapter 10
Lecture Slides
Video: Following Up ANOVA
It is REALLY important that you learn how to Posthoc ANOVA designs correctly.
The first choice, is some sort of direct posthoc comparison like a Tukey test. If you want to go down this road is important that you understand the issue of liberal versus conservative tests and their impact on posthoc analysis. A Tukey HSD test is a good one to use for most practical purposes. The other issue to understand relates to the inflation of Type I error and multiple comparisons. This is where corrections like the Bonferonni correction come into play. Another good thing to understand.
The second choice involves in examining how variance is partitioned and involves using contrasts to pull apart significant ANOVA effects. There is a lot on the use of contrasts in the Field textbook.
Video: Posthoc Analysis
Video: Multiple Comparisons
Video: Contrasts
EXAM QUESTIONS
1. Explain the logic of contrast analysis.
2. What are posthoc tests and how are they used?
Lecture Slides
Video: Following Up ANOVA
It is REALLY important that you learn how to Posthoc ANOVA designs correctly.
The first choice, is some sort of direct posthoc comparison like a Tukey test. If you want to go down this road is important that you understand the issue of liberal versus conservative tests and their impact on posthoc analysis. A Tukey HSD test is a good one to use for most practical purposes. The other issue to understand relates to the inflation of Type I error and multiple comparisons. This is where corrections like the Bonferonni correction come into play. Another good thing to understand.
The second choice involves in examining how variance is partitioned and involves using contrasts to pull apart significant ANOVA effects. There is a lot on the use of contrasts in the Field textbook.
Video: Posthoc Analysis
Video: Multiple Comparisons
Video: Contrasts
EXAM QUESTIONS
1. Explain the logic of contrast analysis.
2. What are posthoc tests and how are they used?