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
12 views

Creating a scatter plot with multiple (>10) variables from repeated measures in SPSS [migrated]

Some explaining facts in the beginning: I have got my data structured in SPSS in the following way. I've got 20 variables (case_number, a_1, b_1, c_1, a_2, b_2, c_2, ....) The variables are named in ...
0
votes
0answers
11 views

Sphericity for a repeated measure ANOVA with whithin and between subjects design, using R

I need to perform a four-way ANOVA with repeated measures and to calculate the sphericity for eventual correction of the degree of freedom of the F ratio. I have three within subjects factors ...
0
votes
0answers
13 views

specification of mixed effects model with two levels of repeated measures (in R)

My colleagues and I conducted a study of the effects of an experimental translocation on the movement and activity patterns of common brushtail possums in New Zealand. This involved first capturing 12 ...
1
vote
0answers
9 views

Given the same before-after differences within groups, is it relevant whether time trajectories converge or diverge?

Both drugs are associated with the same decreases in mean blood pressure in both scenarios. Given that we attach the same meaning to any blood pressure decrease of the same amount, does scenario B ...
0
votes
1answer
12 views

Using lmer for repeated-measures and RCBD

I am trying to figure out the best way to model the error using lmer for a randomized complete block design (RDBC) where we measured soil nitrogen weekly for 2 years. There are: 4 Blocks (A, B, C, D) ...
1
vote
1answer
35 views

Need help selecting appropriate statistical method for animal study

I could use some help deciding on the proper statistical method for a current experiment. The experiment is setup as follows: Independent Variable: Diet (4 groups of 10 for a total of 40 animals) ...
1
vote
0answers
4 views

how can I do a 3-way repeated measures ANOVA on filtered data?

I have a sample of participants tested on a two-day memory task where they learn the task on day 1, then are tested on day 2. They are Parkinson's disease patients and are tested on or off their ...
0
votes
0answers
7 views

Is a Mixed type III anova appropriate for unequal N data? How does one run this analysis in R?

I have a dataset from a psychological experiment that consists of three repeated measures of responses to different kinds of items 'variable', as well as two between-subject IVs, 'condition' and ...
0
votes
0answers
8 views

repeated measures threeway linear mixed model

I'm new to using R, only started in the last 2 weeks so I apologize if I'm missing something very obvious. I am analyzing data from a repeated measures experiment with three factors, diversity (2 ...
0
votes
0answers
13 views

Mixed effects model for repeated measures to test for factors that are either constant or dynamic within an individual over time

I am dealing with a rather complicated dataset with repeated measures of the same individuals at various time points (samples were collected at different time points and different number of samples ...
0
votes
0answers
20 views

How can I find the variance components from a MCMCglmm output?

I have a dataset in which birds (n=55) were measured twice for five different behaviours. I am now trying to statistically test if individuals are reapeatable/consistent in their behaviours or not. I ...
0
votes
0answers
29 views

Multivariate Mixed Model With Continuous Independent Variable - SPSS or R?

I've been trying to find an appropriate statistical technique to analyze multiple IVs and DVs with no luck. The IVs include 1 trichotomous within-subjects factor, 1 dichotomous between-subjects ...
0
votes
0answers
18 views

Degree of freedom in post-hoc test

I have a crucial question (crucial for a statistic beginner as me...) I have run a 2x2 repeated meausure ANOVA between subjects where I had: Factor Between: Subject Category (14 musicians/14 ...
2
votes
0answers
10 views

Interpreting interaction between time and time-varying predictor in mixed models

I have measured the DV and predictor at 2 timepoints in a single group, and am using the MIXED procedure in SPSS. I want to see whether change in the DV over time is predicted by change in the ...
0
votes
0answers
21 views

Which test do I need to apply for repeated measures?

My research question is as follows: How does on-ground presence of bird species A, B, and C change in relation to: 1. species A breeding chronology, and 2. time of day/month My data consists of ...
2
votes
1answer
47 views

How to handle multiple measurements per participant, with categorical data?

I've done an experiment where I've collected measurements from a number of participants. Each relevant data point has two variables, both categorical: in fact, each variable has two possible values ...
1
vote
0answers
12 views

Test retest reliability for a test taken multiple times

In our study, we would like to assess the reliability of a test measuring pitch discrimination thresholds. For this, we let participants take an adaptive threshold test (staircase procedure). We ...
2
votes
0answers
16 views

Test analysis - repeated measures

I lack the experience and can't find an answer anywhere at the moment. The situation is as follows: I would like to test a new device measuring the heart rate of a patient. For this, I have observed ...
3
votes
1answer
77 views

Repeated-measures linear mixed effect model

I have used a repeated-measures ANOVA in SPSS to analyse some of my data. It's the typical approach in my area, but I think it might be more appropriate to use a mixed effect model. However, I ...
0
votes
0answers
16 views

ANOVA for multiple repeated measurements

My dataset consist of the following columns: ...
0
votes
0answers
12 views

two-way repeated measures generalized estimating equations

I have a procedural question more than anything. I have a two-way within subjects design with a dichotomous outcome (success/fail) that I want to analyze using generalized estimating equations (GEE). ...
1
vote
0answers
38 views

How to combine time series measured in multiple experiments?

I have recorded neural activity over time in mice while they perform a task. There are several mice, each ran different numbers of sessions, and repeated the task different numbers of times each ...
0
votes
0answers
18 views

prove the effectiveness of a covariate using GLM repeated measurements

I do have a rather simple question but could not find a direct answer on other forums. I ran a repeated measures ancova with levels (2) as within-subjects factor on accuracy rates and entered age as ...
0
votes
0answers
12 views

How to input 2AFC data into SPSS

I've conducted some thresholding experiments using 2AFC. I'd like to input this into SPSS to run some analysis but I can't think of how to organise my variables. I mean this question as more a ...
1
vote
0answers
10 views

What will be the best test to determine the significance in this study?

The project does not have a simple design. It is planned as follows: It is a longitudinal observation during 120 days in 48 subjects (with repeated measures using multiple tests); The subjects were ...
1
vote
0answers
19 views

Mixed Effects model with block and autocorrelated fixed effect

I am trying to run a mixed effect model on soils data that were collected at two locations in a randomized complete block design (4 blocks). I am interested in the effect of location and depth (below ...
1
vote
2answers
26 views

Overall significance of multiple downward trends?

I am uncertain how to formally establish that I observe a negative relationship between X and Y in multiple sets of linked data points. I have analyzed several cells in which values of interest (Y) ...
2
votes
0answers
19 views

Use of a sample to define a criterion and to examine difference with clinical sample

Before I can ask my questions, I have to give a little background information. I'm involved in a study using a measure of nonverbal fluency. Subjects are shown a page full of squares, like the one ...
0
votes
0answers
11 views

Why SAS gives more denom DF in type3 test to subject level covariates than time in linear mixed models

I was working on a longitudinal data data set which had information about 59 patients and their psychological test scores measured at 5 different time intervals. I used Containment method type of ...
1
vote
0answers
16 views

Help with repeated measures analysis in a complex design

I'm looking at a study measuring blood flow in the brain, there are 8 subjects in this study, with 18 measurements each. The measurements are done 6 at a time in three different time points ...
0
votes
0answers
10 views

Anova Error term complexity unnecessary?

There is often confusion about properly using Error term in anova. However, following example show that the output remains the same whether it is a simple entry of Error(subject) or more complex ones. ...
4
votes
1answer
26 views

Mixed-design ANOVA or one-way ANOVA with delta values

I have an experiment with one independent variable with 4 levels (4 different treatments) and 1 dependent variable which was measured twice - before and after the treatment (repeated measures). I ...
0
votes
0answers
16 views

Penalized quasi-likelihood

Can anybody explain me why the function glmmPQL(.) in R behaves in different ways, depending on the number of ...
0
votes
0answers
15 views

histograms for repeated measures

I have a repeated measures data set where each variable is measured at several time points.That is say I have 20 subjects in my sample. Each subject is measured for three time points. (There are some ...
0
votes
0answers
15 views

How to Conduct Binary Logistic Regression with Repeated Measures

I have a data set in which the response variable ("Binary_Response") is binary. The explanatory variables I am hoping to include with my model are categorical and also binary ("Stimulus_Order" & ...
0
votes
0answers
14 views

Issue in Interpreting SPSS output of GLM repeated measures

I have a data set with repeated measures for each individual. That is there a re two groups, treatment and control. And each individual is measured at 3 time points. But there are missing values. That ...
0
votes
0answers
15 views

How to Analyze Categorical Data in a Repeated Measures Design?

First post. I've read through similar posts and no one's quite answered it already, so I thought I'd throw my hat in the ring. Here goes: I have a repeated-measures design planned proposes to ask a ...
1
vote
0answers
9 views

How to order the support of proposals with dependent Likert scale data?

For my thesis I wanted to examine the support for 6 proposals to make diets at my university more sustainable. For example: Protein based on insects Reduced meat consumption Plant based ...
0
votes
0answers
5 views

3 groups, 3 measurement points, poisson distribution, baseline difference: GLMM or RM ANCOVA?

I have a small experimental data set. 3 group (n's = 12, 12, 16). T1 is baseline before intervention. T2 post-intervention, T3 follow-up (times between testing vary). The DV is count data that fits a ...
1
vote
0answers
21 views

Correcting for family-wise error rate with series of repeated measures ANOVA?

I am trying to make requested revisions to an accepted manuscript, and I am baffled by the following comment from a reviewer: "Eight hypothesis tests are reported in the final paragraph of the ...
0
votes
0answers
17 views

Measure for comparing serial measurements of multiple variables in treatment vs control group?

Can anyone suggest whether I am going about the statistics in an appropriate way? I have two groups of populations which have similar characteristics. In each member of both groups, serial ...
0
votes
0answers
23 views

What is the reverse of the between estimator called?

Between estimator is defined as running a regression of the form: $Y_i = C + B_0X_i + e_i$ On panel data, where Y is the cross sectional mean of Y, X is the cross sectional mean of X. As a result of ...
0
votes
0answers
12 views

Two way mixed design ANOVA

In the article here in slide 27 two way mixed design anova it says that the data are represented as But does this mean that the same subject is in both intervention and control groups? Can this be ...
2
votes
1answer
29 views

repeated measures anova using minitab

I have to analyze repeated measures data set where each subject’s BMI is measured at several time points. I have two sets of subjects where some were given drug1 and another group of subjects is ...
2
votes
0answers
25 views

Repeated measures MANOVA

I have to analyze a data set of the following format Here the subjects receiving the two treatments are different For this I thought of using a repeated measures MANOVA. Is this a correct ...
0
votes
1answer
24 views

Comparing categorical outcome variables in repeated measures design

I am working on an observational prospective longitudinal study with a repeated measures design. The same categorical outcome is measured for five times, for all the participants, over a time period. ...
1
vote
0answers
30 views

Repeated measures ANOVA of an experiment

Here's something that has bugged me a little bit and is quite fundamental to running statistics in experimental settings. Say I run a psychological experiment with 1 categorical IV (load: 4 levels) ...
1
vote
0answers
20 views

Monte-Carlo simulation of repeated-measures ANOVA

I want to conduct a Monte-Carlo simulation of a repeated-measures ANOVA. The random numbers used for the simulation need to have specified mean values, standard deviations and correlations between the ...
0
votes
1answer
13 views

Does this qualify as a covariate in a RMANOVA?

I am confused as to whether a variable qualifies as a covariate in an RMANOVA. How can I find out and how do I use it? In a (hypothetical) within-subject, counterbalanced order, I present 2 memory ...
0
votes
0answers
29 views

Repeated measures: Relation between baseline adjusted ordinary regression and random intercept model

I'm currently trying to familiarize myself with linear mixed models (with normally distributed continuous outcome, no generalized versions for the time being). One particular question I'm currently ...