Lecture 7D: Two-way Repeated Measures ANOVA Flashcards
What design does a two-way repeated measures ANOVA use?
Within-subjects design and mixed design.
Explain within-subjects design
- Both IVs are repeated factors
- E.g. Knee isometric extension strength was measured at 3 joint angles in both the dominant and non-dominant leg.
IV: joint angle (repeated) and dominance (repeated)
Explain mixed design
- One factor is repeated, the other is an independent factor
- E.g. Knee extension strength was measured before and after a treatment program in the experimental and control groups.
IV: time (repeated) and group (independent)
In a within-subjects design of two-way repeated measures ANOVA, what are the characteristics of the independent variables?
Both independent variables are repeated factors.
In a mixed design of two-way repeated measures ANOVA, what is the characteristic of the independent factors?
One factor is repeated and another factor is independent.
What does the interaction effect in a two-way repeated measures ANOVA indicate?
Whether different groups change differently over time.
What test is used to check baseline characteristics in a two-way repeated measures ANOVA?
Independent t-test.
What was the conclusion regarding shoulder ROM at baseline between experimental and control groups?
There is no significant difference in shoulder ROM between the two groups at baseline.
What is the significance of the F-value in the tests of within-subjects effects?
It indicates whether there is a statistically significant interaction between time and group.
What post-hoc analysis method is used after a two-way repeated measures ANOVA?
Paired t-tests with Bonferroni correction.
What is the difference between one-way ANOVA and two-way ANOVA?
One-way ANOVA: 1 independent variable, Two-way ANOVA: 2 independent variables.
What statistical test would be appropriate for comparing study time among three groups of students?
One-way ANOVA.
How to decide between using one-way/two-way ANOVA?
