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help > RE: 2-by-3 repeated measures ANOVA
May 13, 2022 11:05 AM | Andrew Zalesky
RE: 2-by-3 repeated measures ANOVA
Hi Konstantinos
- Yes, your design matrix looks ok. You would most likely be interested in the contrast [0 1 0 0 0...], which would test for an interaction effect.
- I'm not sure what you mean by the 4 separate tests. Perhaps you are referring to a conjunction analysis? NBS only allows for single contrasts. To test for the main effect of ASD, use [1 0 0 0 0 ...].
- Note that the GLM in NBS is just like any other GLM. So if you can formulate your design for FSL or other software, then it will be the same design for NBS.
Andrew
Originally posted by Konstantinos Tsilimparis:
- Yes, your design matrix looks ok. You would most likely be interested in the contrast [0 1 0 0 0...], which would test for an interaction effect.
- I'm not sure what you mean by the 4 separate tests. Perhaps you are referring to a conjunction analysis? NBS only allows for single contrasts. To test for the main effect of ASD, use [1 0 0 0 0 ...].
- Note that the GLM in NBS is just like any other GLM. So if you can formulate your design for FSL or other software, then it will be the same design for NBS.
Andrew
Originally posted by Konstantinos Tsilimparis:
Dear dr. Zalesky,
Thank you for your answer.
Additionally, I would like to test the interactions between Group and Emotion. For this reason, I opted for a 2x2 Repeated Measures ANOVA. The design matrix that I used is (I suppose that each group has 2 subjects: ASD->1, Control->-1):
1 1 1 0 0 0
-1 -1 1 0 0 0
1 1 0 1 0 0
-1 -1 0 1 0 0
1 -1 0 0 1 0
-1 1 0 0 1 0
1 -1 0 0 0 1
-1 1 0 0 0 1
Column 1: Emotion (Angry->1, Happy->-1)
Column 2: Group x Emotion
Column 3-6: Within-subject means
Is this Design Matrix correct?
More particularly, I would like to test: ASD~=CT and Angry~=Happy with an F-test ('~=' means 'not equal to').
Also, I would like to test with 4 separate t-tests:
ASD>CT when Angry>Happy
ASD>CT when AngryASDHappy
ASD
What contrasts can I use for these comparisons?
Lastly, I use exchange blocks for this statistical test:
[1;1;2;2;3;3;4;4]
Kind regards,
Konstantinos Tsilimparis
Thank you for your answer.
Additionally, I would like to test the interactions between Group and Emotion. For this reason, I opted for a 2x2 Repeated Measures ANOVA. The design matrix that I used is (I suppose that each group has 2 subjects: ASD->1, Control->-1):
1 1 1 0 0 0
-1 -1 1 0 0 0
1 1 0 1 0 0
-1 -1 0 1 0 0
1 -1 0 0 1 0
-1 1 0 0 1 0
1 -1 0 0 0 1
-1 1 0 0 0 1
Column 1: Emotion (Angry->1, Happy->-1)
Column 2: Group x Emotion
Column 3-6: Within-subject means
Is this Design Matrix correct?
More particularly, I would like to test: ASD~=CT and Angry~=Happy with an F-test ('~=' means 'not equal to').
Also, I would like to test with 4 separate t-tests:
ASD>CT when Angry>Happy
ASD>CT when AngryASDHappy
ASD
What contrasts can I use for these comparisons?
Lastly, I use exchange blocks for this statistical test:
[1;1;2;2;3;3;4;4]
Kind regards,
Konstantinos Tsilimparis
Threaded View
| Title | Author | Date |
|---|---|---|
| Konstantinos Tsilimparis | Mar 2, 2022 | |
| Konstantinos Tsilimparis | May 13, 2022 | |
| Konstantinos Tsilimparis | May 11, 2022 | |
| Andrew Zalesky | May 13, 2022 | |
| Konstantinos Tsilimparis | May 13, 2022 | |
| Andrew Zalesky | May 13, 2022 | |
| Andrew Zalesky | Mar 3, 2022 | |
| Konstantinos Tsilimparis | Mar 28, 2022 | |
| Andrew Zalesky | Mar 29, 2022 | |