# Tagged Questions

23 views

### Estimated marginal means significant, interaction not

This is probably pretty basic question, but how come I can get totally non-significant 3-way interaction, while all the marginal means are significant? See the 3 way interaction in the table.
29 views

### Determining best approximator based on repeated measurements

I have a set of data (which I have attached a plot of for your convenience) in which I have 2 categories of interest - let's call them A and B. For each of them I want to select from a series of ...
13 views

### Repeated Measures of Dependent Randomized Conditions

I'm designing an experiment to evaluate how learnable a software tool is. The basic setup is to have $n$ subjects perform $m$ tasks in a random order, and then test whether the subjects performed ...
61 views

### What statistical test is appropriate for correlations within repeated measures?

We have $N$ individuals measured repeatedly in time. For each individual, at each measurement, we measure the values of two variables: $A$ and $B$. The number of measurements per individual might ...
301 views

### How to report result from two-way repeated measures ANOVA?

I have conducted an empirical study as part of my master thesis. I have developed a software tool where cards can be sorted (affinity diagram) and in the study each test subject did a number of ...
57 views

### Significance test for categorical repeated measure data

Despite my best search, I wasn't able to find any solid leads for my problem, so I thought I would share it with the community. It's a question about how to detect a difference between multiple ...
116 views

### Significant difference between difference scores of 2 groups on two measures?

I am investigating a discrepancy between male and female self reports of sexual experiences. The original survey consists of a female version (asking about victimization) and a male version (asking ...
54 views

### Which repeated measure statistical test must I use in this case?

I have a set of general conditions A, B, C, D, E and F to solve a problem. Each of these conditions lead me to different number of experiments according to a parameter that i change in each general ...
26 views

### How to test for significant difference between 2 binary variables in one sample [duplicate]

I would like to test if there is a significant difference between the pre-test and post-test in a dichotomous variable (0 = "False", 1 = "True"). I'm using only one sample of 30 subjects. So, my 2 ...
103 views

### How to test difference between two items rated on a Likert scale by same participants?

I have conducted a survey with multiple 5 point Likert scale questions ranging from 1 = very unimportant to 5 = very important. I used frequency distributions, and stacked bar charts to show which ...
61 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? ...
901 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 ...
69 views

### Effect of duration of treatment on the outcome at different time points

I am interested in knowing if the duration of treatment has an effect on treatment with two different drugs. We have used two different drugs to treat cerebral ischemia (brain damage) and continued ...
450 views

### How can I compare the effect of an pre-post intervention between two groups with multiple numeric dependent variables?

I have collected data from two groups (age 25-30, age 30+). In each group I have 10 patients. I performed several medical tests (i.e., R.B.C, Liver test, etc.) on the patients, before and after ...
8k views

### How to analyse pre and post test data when the outcome measure is Yes/No data?

I am doing research on 20 participants and the participants will work on a lab module. There will be a pretest before the lab module and post test after the lab module on concepts related to ...
46 views

### Can two RM ANOVAs be run including one variable that is the same but this variable only be significant in one of the ANOVAs? [duplicate]

Possible Duplicate: Why ANOVA/Regression results change when controlling for another variable I have used SPSS to run two RM two-way ANOVA with the same data. RM ANOVA #1 has two within ...
255 views

### How to deal with a 2x2 experimental design if the dependent variable is dichotomous?

I am assessing the acceptability of a sentence in a within-subjects design with two crossed factors (type of sentence, missing word). After reading each sentence, the participants answer a simple ...
134 views

### Controlled experiment with binary outcome variable

I have data from an experiment where students were tested on multiple words for the correct pronunciation of a specific linguistic phenomena. The experiment was done with a control and experimental ...
631 views

### How to test for significant differences in means across four within subject conditions where dependent variable is a proportion?

I have a dataset with four within-subject conditions. Participants gave binary answers to 8 questions in each condition, and these were averaged to form a proportion for each condition. I would like ...
372 views

### Significance test for differences in baseline and remeasurement rates between two groups

I need help in knowing which test to perform with this analysis. I have two groups (lets say group A and B). A study was performed with initial rates of heart failures in group A and B (i.e, ...
471 views

### How to calculate if the between-subject variability is significant given repeated measurements?

I have a question that's been bothering me research wise. The situation is as follows: We are measuring a quantity in subjects for which we assume that it differs significantly between ...