# Tagged Questions

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### $\textit{Post hoc}$ test after repeated measures ANOVA (LME + Multcomp)

I have a dataset where the samples are dependent, belong to different groups, and measurements were taken over time. It looks like this: Subject Group Time Value S1 G1 12h 5.55 S1 G1 24h ...
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### How to find significant difference in a group/ ANOVA

Am I right to say that the results from the a repeated measures ANOVA does not tell you where a difference is in the group (if any)? So a post hoc test needs to be carried out? I'm using Stata to ...
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### MANOVA vs repeated measues ANOVA example

I have the following situation (4 independent treatment groups, each group is tested for 3 dependent variables) and was wondering what would be the best to do: What is the best test to do? I have ...
59 views

### lme vs lmer vs aov for three factor repeated measures design

I'm trying to run a tree-way repeated measures ANOVA on the following data: I have a completely balanced design with three within-subject factors (type, form and ch - channel) and one dependent ...
160 views

### Interpreting a significant 2-way interaction with post-hoc tests

I'm analyzing reaction time data from a repeated measures ANOVA with the following design: Factor 1 (between-group): GROUP (controls, clinical) Factor 2 ...
110 views

### testing differences between levels of a factor in a linear mixed model

I'm trying to wrap my head around using a linear mixed model and appropriate post-hoc tests to determine if there is a significant difference between various treatments in an experiment I inherited. ...
1k views

### Interpreting Two-way repeated measures ANOVA results: Post-hoc tests allowed without significant interaction?

I have conducted a study where I employed a two-way repeated measures design to investigate whether subjects respond to a main treatment effect. What I'm mainly interested in is whether subjects ...
1k views

### 2x2x5 repeated measures ANOVA: significant 3-way interaction

I have 3 within-subject factors, namely offset (1px, ..., 5px), side (left, right) and color ...
1k views

### Post Hoc test for between subject factor in a repeated measures ANOVA in R

I have done an experiment of how different animal species affect nutrient fluxes in sediments. I had a number of experimental units (sediment boxes) to which different animal species were added. I ...
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### Post-hoc analysis when variable effect is non-significant

In a dataset with 3 related measurements for each case, I ran a Friedman test, and found no significant effect. Is it appropriate to now run (and report) pairwise tests, as I had planned initially? ...
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### Calculating Tukey HSD following a repeated measures ANOVA

I was wondering how to calculate Tukey's HSD to follow up a three-way repeated measures ANOVA by hand. I tried to infer how to do it by modifying what I would do in a between subject ANOVA, but I'm ...
855 views

### Comparing groups at different time points within repeated measures study using SPSS

I have done a RCT (randomized control trial) of an intervention (which is of 6 week duration) versus control. The outcome measure (an exercise test) has been tested pre-intervention (Pre), immediately ...
1k views

### Post-hoc test after 2-factor repeated measures ANOVA in R?

I have problems finding a solution regarding how to run a post-hoc test (Tukey HSD) after a 2-factor (both within-subjects) repeated-measures ANOVA in R. For the ANOVA, I've used the aov -function: ...
2k views

### Pre-test, post-test multiple comparisons

This feels like it should be a very straightforward stats analysis but I'm struggling to find a solution. I have a data set made up of pre- and post-test continuous data values taken from multiple ...
2k views

### Anova repeated measures is significant, but all the multiple comparisons with Bonferroni correction are not?

I counducted a mixed model ANOVA with time as the within subjects variable (3 levels) and group as the between subjects variable (2 levels). All is significant (time, group, and timeXgroup). To test ...
1k views

### Using lme to analyse a complete randomized block design with repeated measures: Is my model correct?

I've got a completely randomized block design with three treatments and four replications. Biodiversity was measured in four successive years. I figured that a mixed model with repeated measures as ...
3k views

### What is a valid post-hoc analysis for a three-way repeated measures ANOVA?

I've performed a three-way repeated measures ANOVA; what post-hoc analyses are valid? This is a fully balanced design (2x2x2) with one of the factors having a within-subjects repeated measure. I'm ...
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### Non-parametric test for repeated measures and post-hoc single comparisons in R?

Some attribute $x$ of 17 individuals was recorded repeatedly on 6 time points using a Likert scale with 7 distractors. Which statistical test(s) can I apply to check whether the changes along the 6 ...
739 views

### What type of data analysis (ANOVA) should I run on this experiment?

I am not sure how I would analyse this data: The experiment is looking at the accuracy of emotion recognition in children with ADHD. The children will be asked to identify what emotion a face is ...