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help > RE: Design matrix and contrast for 2 way ANOVA, and f-value
Jan 20, 2020 02:01 PM | davideit7
RE: Design matrix and contrast for 2 way ANOVA, and f-value
Hi Dr. Zalesky,
eventually I've decided to use the design matrix below (2nd column treatment, 3rd condition, 4th interaction)
eventually I've decided to use the design matrix below (2nd column treatment, 3rd condition, 4th interaction)
1-P_A 1 1 1 1
1-P_B 1 1 -1 -1
2-P_A 1 1 1 1
2-P_B 1 1 -1 -1
3-D_A 1 -1 1 -1
3-D_B 1 -1 -1 1
4-D_A 1 -1 1 -1
4-D_B 1 -1 -1 1
as you suggested I've used a t-test and separately used a contrast of 1 and -1, however I'm not sure about the meaning of the different contrasts:
0 -1 0 0 means that group drug > group placebo ?
0 0 -1 0 means that cond B > cond A ?
0 0 0 -1 what would be here the meaning? How can I define this interaction?
Sincerly,
Davide
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| Title | Author | Date |
|---|---|---|
| Woomi Ban | May 30, 2019 | |
| davideit7 | Dec 5, 2019 | |
| Andrew Zalesky | Dec 6, 2019 | |
| davideit7 | Dec 6, 2019 | |
| Andrew Zalesky | Dec 7, 2019 | |
| davideit7 | Jan 20, 2020 | |
| Andrew Zalesky | Jan 21, 2020 | |
| davideit7 | Jan 22, 2020 | |
| Andrew Zalesky | Jan 23, 2020 | |
| Woomi Ban | Jun 10, 2019 | |
| Andrew Zalesky | Jun 10, 2019 | |
| Andrew Zalesky | Jun 1, 2019 | |