Repeated measures data occurs when more than one measurement is collected on the same unit (e.g. subject). This data cannot be analysed through normal methods because the rows in the data are not independent due to the multiple measurements. The time sequencing of the measures may not be important.

learn more… | top users | synonyms (1)

0
votes
0answers
4 views

Repeated measurement model for Dichotomous variable in spss?

I have a repeated data in 7 diffrent time and 4 group. my variable is Dichotomous (yes/no). How I can do it with spss? what non-parametric test could I use? I appreciate your answers Leili
1
vote
1answer
18 views

Cosinor analysis with repeated cycles

I'm interested in developing a model for the circadian rhythm of hormone levels via a cosinor analysis. I just started looking into cosinor analyses so I have a few questions. The data is being ...
5
votes
2answers
62 views

How to model the effect of time in a balanced repeated measures design with 2 measures each at baseline, during instruction and post instruction?

I want to examine growth for 38 participants. I have 2 scores at each of 3 separate phases of instruction - baseline, during instruction, and post instruction. Restated, I have 2 baseline scores, 2 ...
0
votes
0answers
8 views

How to compute needed sample size with G*Power [on hold]

I made a repeated measure design with one factor, four groups, 10 persons The analyses yield Effect size 0.391, p-value = 0.112. Lets assume I am making a type II error. How do I compute the sample ...
1
vote
0answers
12 views

some suggestions for analyzing two-factor within subject design?

I'm doing a two-factor within-subject design experiment, and the two factors are all categorical variables. factor one has four categories, while factor two has two categories, and is counterbalanced. ...
3
votes
2answers
114 views

Why am I getting inconsistent results from Wilcoxon signed rank test and Kruskal-Wallis test?

I am doing a study on 3 drugs, comparing response pre-post treatment. My objective is to know if these drugs are effective and which one is better. I used non parametric tests since the results ...
0
votes
1answer
32 views

Two-way repeated measures ANOVA with unbalanced data

I have a system / operator repeated measures data set for which I would like to answer the questions: is system 1 quicker than system 2 is operator 1 quicker than operator 2 does the order of using ...
1
vote
0answers
23 views

How to do multiple regression with within-subject independent variables using SPSS?

I have two groups of subjects, both undergoing two experimental conditions. During the experimental conditions, the subjects take questionnaires for evaluation of the mood states, and blood pressure ...
1
vote
1answer
27 views

Specifying variable levels in multilevel repeated measures in R using lme4

I am trying to analyze a dataset in which there are three measures on patients within areal units, however I am having trouble in how I am thinking about random/fixed effects and including covariates ...
0
votes
0answers
24 views

Getting unexpected lme results

I am evaluating an experiment in which subjects had to rate quality of audio files. The design of the experiment is repeated-measures. So I'm trying to figure out which factors have an impact on ...
1
vote
1answer
47 views

How do I perform this complicated ANOVA type analysis in R?

I have the following type of dataset: | | | variable_r | subject | gender | age_group | Cond_1 | Cond_2 | ...
0
votes
1answer
45 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 ...
-1
votes
1answer
26 views

How to confirm a two-way interaction in a three-way ANOVA model using SPSS

I have two groups of subjects, both undergoing two experimental conditions, and data are collected at two time points: pre- and post- condition. I run a 3-way ANOVA, with one between subject factor ...
0
votes
1answer
12 views

ANOVA with repeated mesures - No random groups

I have 4 groups, 3 of them receiving a treatment and the last nothing. I will do two mesures, before and after the treatment. But my groups are pre-defined, not resulting of a random selection. Is ...
0
votes
0answers
10 views

How to do and interpret a generalized estimating equation

My study is looking at the effects of enclosure type (1 IV (penned v not penned)) on the stereotypical behaviours and interactions (2 DV's (counts)) of elephants, however using rain (yes/no) and high ...
0
votes
1answer
28 views

Can I use ANOVA if a sample is not normally distributed

My data are not normally distributed. I have to compare three groups for their achievement in skill learning. $n=4$ in each group. I have used three methods ($M1$, $M2$ and $M3$) to teach one skill to ...
0
votes
1answer
39 views

comparing a variable (that is repeatedly measured) between groups in R

I have a rather simple question (I hope) but for some reason I can't find the right/ a working answer anywhere on the web. For my research I have measured mood on a scale 1-10, 6 times a day for 5 ...
0
votes
0answers
9 views

Oddly structured data - longitudinal data struggle - Interaction testing

I'm struggling with an analysis and I'd like to have your contribution. I work with neuroimaging, and I have tested the capacity of a certain imaging parameter (let's call it A) of predicting a ...
0
votes
0answers
44 views

Statistic for count process and measurements

I am facing some problems concerning which statistical approach to use for my measurements. I have a sensors which counts how many times an events occured. I had to characterize two lots of sensors, ...
0
votes
1answer
29 views

Can repeated measures ANOVA be used with only 2 time points?

I am analyzing my data of my experiment and I have a question concerning the repeated measures ANOVA. I have 2 independent variables (temperature and salinity), 1 dependent which is length and 2 ...
1
vote
0answers
31 views

Repeated measure two-way ANOVA (non-parametric)

Non-parametric ANOVA – a hot topic that is unanswered. There are many questions on this topic online. However, they all seem to end in a debate and no definite answer or clear explanation (that I ...
0
votes
0answers
35 views

ANOVA to find subjects that responded significantly different between treatments

I have a dataset composed of several subjects exposed to two different treatments (treat) in three distinct times (test), and I am interested in highlighting which subjects have significantly ...
0
votes
0answers
10 views

Help: Am I using the correct test to detect differences from zero (multivariate ANOVA repeated mesures)

01 August 2014 11:17 Hi, I have 5 measures repeated 3 times under 3 different scenarios (conditions). The measures are survey questions and participants use a visual analogue scale to mark a ...
0
votes
0answers
10 views

Help: Repeated Measures Multivariate Analysis in SPSS

I have 5 measures repeated 3 times under 3 different scenarios (conditions). The measures are survey questions and participants use a visual analogue scale to mark a response from 0.0 to 15.0. Thus ...
0
votes
2answers
35 views

What statistical test(s) should I use for this kind of repeated measures data?

Assume I have this kind of data: $ A_{11}\quad A_{21} \\ A_{12}\quad A_{22} \\ A_{13}\quad A_{23} \\ B_{11}\quad B_{21} \\ B_{12}\quad B_{22} \\ B_{13}\quad B_{23} \\ C_{11}\quad C_{21} \\ ...
0
votes
0answers
27 views

Understanding ANOVA formula in R and choosing the most appropriate model

I am new to R (and by extension statistics), and am having a tough time in making sense of this repeated measures ANOVA formula, please bear with me. I think I understand what the formula implies, but ...
0
votes
0answers
4 views

After ordering data, sorting the other variables ascending [migrated]

I'm still at a beginning level of R, so I'm having difficulty to make a certain plot called a "lasagna plot". for this I need to first order my data by a categorical value. but after this i have no ...
1
vote
1answer
28 views

Repeated measures vs. cluster in logistic regression

I have data from an experiment in which participants played a repeated game 50 times. That is, I have 50 data points per participant. I want to run a logistic regression and I have of course to take ...
0
votes
0answers
24 views

Tukey's HSD after Repeated Measures One-Way ANOVA

We compare the performance of >2 classifiers. Samples are drawn from n-fold cross-validations on the same data sets. We are aware of the fact that cross-validation makes the samples dependent, because ...
1
vote
0answers
17 views

Difference between Time series and repeated measures analysis? [duplicate]

Can anyone please elaborate what is the difference between Time Series Analysis and Repeated Measures models? Also, Can we forecast based on the Repeated Measures model having Time as a covariate?
3
votes
1answer
20 views

Equivalent of paired $t$-test for dispersion

I'd like to compare, in a within subject design, the dispersion of two conditions. At first I thought about taking the standard deviation by individual and condition, and compute a paired $t$-test on ...
1
vote
0answers
36 views

Can I do two factor repeated measures ANOVA with differing numbers of measures per group?

I want to compare reaction time in four groups but I have three measures (pretest,post test and delayed post test) only in one of the groups. it was impossible to give post test and delayed post test ...
0
votes
0answers
13 views

Fitting a Mixed Model with Random and Repeated effects in SAS

I have want to fit a linear regression with repeated measures and random effects. The data come from clinical observations. In CT images The dependent variable is the diameter of a lymph node lesion ...
0
votes
0answers
20 views

SPSS Repeated measures with different pre-post measures

I have the following data: 20 participants, each one going through 2 types of treatments (A & B) at 3 different sessions (times). For each treatment session, i am collecting 6 "normal" ...
1
vote
0answers
25 views

How to apply the random statement in my model?

i am trying to model the following data in SAS using proc glimmix and i would like feedback if i have modelled my data correctly. My data consist of individual chickens (ID) who are grouped by ...
1
vote
1answer
20 views

How to analyze two-way within subjects design with binary data

I am interested in testing how users perform on three different user interfaces. On each of the three interfaces, a person will try 12 Tasks. So each participant will do Task 1 three times, Task 2 ...
0
votes
1answer
50 views

Repeated-measures, crossover analysis using linear mixed model in R

I have a data set that I am attempting to analyse in R and I am relatively new to the environment. My full data set contains 7 subjects (represented by Subject), that all receive 3 treatments ...
1
vote
0answers
34 views

Odds ratios from logistic regression on subsets of data using R

I have 15 subjects each with 200 trials & I'd like to run separate regressions for each subject. If I just run the regression on the whole dataset I am able to generate odds ratios / confidence ...
0
votes
0answers
10 views

Reliability Measure for Unequal Subjects between Raters?

I am comparing two medical imaging analysis techniques, and I would like to assess the inter- and intra-rater reliability for using each method. I am planning the study design, and would like help ...
1
vote
0answers
43 views

F-ratio in repeated-measures ANOVA

In factorial designs with one random factor and one fixed factor, the expected mean square for the fixed factor does contain three sources: the main effect, the interaction, and error Therefore, to ...
0
votes
0answers
29 views

Analysis of repeated treatment design (Linear panel model vs. ANOVA)

General information Assume you have the following quasi-experimental repeated treatment design (T = Treatment, M = Measurement): ...
1
vote
1answer
30 views

Repeated measures paired test

I have the following data: 2 conditions - experimental & control. 20 participants, each having 3 results for each condition. Like in the following table: ...
0
votes
0answers
20 views

Use repeated measures to predict binary outcome

I had an experiment using a 2 (between-subject variable, say Drug treatment) X 3 (within-subject variable, say Condition, which is counter-balanced, so time is not a concern here). Each condition has ...
1
vote
0answers
32 views

Understanding repeated covariance types in SPSS?

I am working in SPSS on a repeated measures linear mixed model and I am having a really hard time wrapping my head around how to select a "repeated covariance type". The options are: ...
0
votes
0answers
38 views

Within-subject and between-subject fixed effects in mixed model

I've been trying to analyze some data using mixed models but I have some troubles to understand how should I include both within-subject and between-subject fixed effects in such models. Let's ...
1
vote
0answers
37 views

MANOVA for mixed model with multiple repeated measurements

I struggle performing a MANOVA for a mixed model. I have the following columns: S - subject (1,...,N) B - in between group (B1, B2) W - repeated measurement - within (W1, W2) M - measured dependent ...
2
votes
0answers
17 views

Analysis of ordinal data with multiple assessments per unit… the right approach?

Suppose I have a dataset with the following information: N objects, each of which can be rated The number of ratings per object is variable (raters are unidentified), e.g., there are 30 objects each ...
6
votes
1answer
85 views

Test whether time of maximum differs across two groups

Suppose I have 10 repeated measurements of a quantitative variable $X$ of the individuals within two groups (let's call them A and B). For each group, I have the estimated means of variable $X$ at the ...
1
vote
0answers
19 views

How to model a multiplicative effect of a parameter

I am having difficulty in fitting a model on data. Basically, I have data about the evaluation of phenotypic property (i.e. hard) of 65 palm trees by 5 judges. As an evaluation scheme, each judge ...
0
votes
0answers
17 views

How to compute the Greenhouse-Geisser Epsilon for the interaction term of the 2 repeated factors in a Repeated Measures ANOVA

I’m trying to implement a program in C# to get the Greenhouse-Geisser Epsilon for a 2 factor ANOVA design with 3 levels each factor. Following the procedure on ...