0
votes
1answer
66 views

$\textit{Post hoc}$ 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 ...
2
votes
2answers
65 views

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 ...
2
votes
0answers
38 views

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 ...
1
vote
0answers
74 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 ...
0
votes
1answer
221 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 ...
0
votes
0answers
130 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. ...
3
votes
1answer
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 ...
5
votes
3answers
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 ...
0
votes
1answer
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 ...
1
vote
0answers
72 views

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? ...
1
vote
0answers
479 views

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 ...
3
votes
1answer
912 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 ...
4
votes
1answer
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: ...
0
votes
0answers
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 ...
3
votes
1answer
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 ...
4
votes
1answer
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 ...
6
votes
2answers
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 ...
2
votes
1answer
738 views

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 ...
4
votes
2answers
752 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 ...
12
votes
1answer
9k views

Post hoc test after ANOVA with repeated measures using R

I have performed a repeated measures ANOVA in R, as follows: aov_velocity = aov(Velocity ~ Material + Error(Subject/(Material)), data=scrd) summary(aov_velocity) ...
14
votes
5answers
7k views

Post-hocs for within subjects tests?

What is the preferred method for for conducting post-hocs for within subjects tests? I've seen published work where Tukey's HSD is employed but a review of Keppel and Maxwell & Delaney suggests ...