Significant ≠ relevant [Design Issues]
❝ I think that including term to ANOVA to prove it's significance is a bit naive because the true reasons may be various ("We shall see what we shall see"). What is your opinion on that topic?
Correct. Not much likely to be significant anyway, but it can certainly be done. You do probably not run substantial risk by doing so just do it if they ask for it.
❝ And some practical questions:
❝ 1. Which ANOVA model should be preffered in that cases Group, Group x Sequence or... ?(would be very grateful for link)?
Group x Sequence?? Why not just group, tested against the between subject MS?
❝ 2. As I understand the residual variance depends on the quantity of terms (and even the more number of terms the less residual). Can we perform 2 different ANOVA models: first to exclude group effect, and second - to make a standard treatm+period+seq+sub(seq) calcaulation?
Not totally sure, but group would be a between-factor, so I think the residual (and its df) will be the same with and without Group.
❝ 3. What if we do get significant group term? Can we somehow make sure that number of subjects from only one group is sufficient for the study? What else can we take in such a case?
Well, in my opinion that would not change much. You still include both groups in the calculation.
Pass or fail!
ElMaestro
Complete thread:
- Study conduct in groups Smitha 2015-02-02 04:21 [Design Issues]
- Study conduct in groups ElMaestro 2015-02-02 08:21
- Study conduct in groups Helmut 2015-02-02 13:08
- Study conduct in groups Smitha 2015-02-04 04:30
- Study conduct in groups Helmut 2015-02-04 12:57
- Study conduct in groups felipeberlinski 2015-02-04 22:36
- Study conduct in groups ElMaestro 2015-02-04 23:58
- Significant ≠ relevant Helmut 2015-02-05 00:49
- Significant ≠ relevant Astea 2016-03-24 20:10
- Significant ≠ relevantElMaestro 2016-03-24 23:12
- Significant ≠ relevant zizou 2016-03-25 21:41
- Loss of power etc. Helmut 2016-03-26 14:46
- Loss of power etc. Astea 2016-03-27 21:18
- Loss of power etc. zizou 2016-03-27 23:44
- Combined power? Helmut 2016-03-28 14:29
- Loss of power etc. Astea 2016-03-28 23:57
- Loss of power etc. ElMaestro 2016-03-29 00:16
- Mystery Helmut 2016-03-29 17:28
- Back to the Future Astea 2016-03-29 21:57
- Back to the Future ElMaestro 2016-03-29 23:11
- Using lectures != Reading them mittyri 2016-03-30 00:17
- Back to the Future ElMaestro 2016-03-29 23:11
- Back to the Future Astea 2016-03-29 21:57
- Loss of power etc. Helmut 2016-03-26 14:46
- Significant ≠ relevant Astea 2016-03-24 20:10
- Study conduct in groups felipeberlinski 2015-02-04 22:36
- Study conduct in groups Helmut 2015-02-04 12:57
- Study conduct in groups Smitha 2015-02-04 04:30