# mixed anova

1. ### Addtional variables alter results of other variables

Hi all, I conduct an ANOVA with 3 within subjects variables. Everything fine. I then add an additional between subjects variable, and the main effects and interactions for the previous variables all change, even those that don't include the between subjects factor. Why is this? Which one do I...
2. ### Is it ok to run some planned comparisons and some post hoc?

Hello - I am a phd student in psychology and I would be very grateful for some advice about contrasts. I have conducted a naming experiment for which response time was the outcome measure. There were 2 groups (treatment v control) and 3 testing conditions (A, B and C). I ran a mixed 2 x 3...
3. ### Interpreting "Within-subjects contrasts" in Mixed ANOVA

Greeting stats peers, After conducting a 2x2x(3) Mixed Model ANOVA, I am struggling to understand the SPSS output "Within subjects contrast" Specifically, - Factor B" (e.g., a sex-prime) exerted no main or interaction effect; - yet there was a significant AxBxC linear interaction in...
4. ### Mixed ANOVA in R with a nested sampling design

Hi everyone, I would be really grateful if someone can help me with this since i am kind of new in R and not so used to multivariate statistics. I have a dataset of species data collected across 3 habitats and at 3 different scales. However scales 2 and 3 build on scale 1, this is the number...
5. ### Mixed ANOVA: p-Value of within factor increases by adding a between factor...?

Hello, I thought I'm good in math and statistics but this one is giving me a real headache...hope one of the pros here can explain/solve it... I ran a mixed ANOVA with one within and one between factor, both variables have 2 outcomes - pretty easy. Accidentally when I first did it, I...
6. ### normalising data for a mixed anova

Hi, I am running a 3x5 mixed factorial anova. I am testing the effects of 3 training groups over 5 time periods on the same questionnire. The groups means at test 1 vary a lot and I have been advised to normalise the data by using z scores. My question is do I then run the same mixed anova...
7. ### Which ANOVA to use? PLZ HELP :(

Hi guys... Here's what my experiment's about... I am testing 24 subjects to see if different learning methods affect retention performance. I am using a control condition which they'll all do (own method) versus imposed condition which has two levels (multiple colour highlighting and...
8. ### Three-way mixed ANOVA - Post-hoc-analysis (Scheffé-test?)

Hello everybody, I hope someone is able to help me here, because I'm desperate and can't find help anywhere :-(. English is not my first language, so please excuse any errors. For my final thesis, I conducted a 2x2x3 mixed ANOVA in SPSS, mixed meaning that the first factor was a...