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.

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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 ...
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8 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 ...
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20 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 ...
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44 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 ...
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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 ...
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15 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 ...
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74 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 ...
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15 views

ANOVA for multiple repeated measurements

My dataset consist of the following columns: ...
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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). ...
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35 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 ...
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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 ...
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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 ...
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9 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 ...
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15 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 ...
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2answers
25 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) ...
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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 ...
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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 ...
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13 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 ...
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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. ...
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24 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 ...
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16 views

Penalized quasi-likelihood

Can anybody explain me why the function glmmPQL(.) in R behaves in different ways, depending on the number of ...
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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 ...
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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" & ...
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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 ...
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14 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 ...
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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 ...
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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 ...
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19 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 ...
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15 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 ...
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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 ...
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11 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 ...
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1answer
22 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 ...
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22 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 ...
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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. ...
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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) ...
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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 ...
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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 ...
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25 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 ...
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1answer
25 views

What is the regression test equivalent to a repeated measures (factorial) ANOVA?

As in the title, I'm trying to figure out what would be the regression test equivalent to a repeated measures one- and two-way ANOVAs? So, in the case of having different dichotomous IVs and two ...
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1answer
46 views

split-split plot design with unbalanced repeated measures in lme4 or nlme (SAS translation)

I am sorry if this answer has been answered before but most answers here (e.g. here, or here ) do not really adress my issue (or maybe I just do not see correctly how they do. I want to use a (linear) ...
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63 views

How to calculate correlation in repeated measure settings?

We have 2 groups, 20 subjects in each, 5 "time points" (ordinal) and one (continuous) dependent variable. For each subject we measured a continuous independent variable for 5 "time points" (we ...
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1answer
31 views

Multifactorial analysis of variance with repeated measurements-literature

What is the difference between multivariate and multifactor ANOVA? Does anybody have any pointers to downloadable literature about multifactorial analysis of variance with repeated measurements?
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1answer
21 views

nested paired tests

I have a design with patients treated with a certain drug.We have patient data before and after taking drug.Within in these patients there is are two types of people , responders and non responders in ...
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62 views

Help find a statistical test for proportion of a binary outcome with repeated measures

Here is an illustration of my problem: I have two stimuli (A and B) given to a number of subjects. Each subject is sequentially subjected to each stimulus 5 times (AAAAABBBBB or BBBBBAAAAA, but not ...
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2answers
49 views

ANOVA with three IVs

I have a following problem: I have some research data that need to be analysed. There are three randomized independent variables (binary) and one dependent variable (reaction time). The data consists ...
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0answers
21 views

How does GEE (Generalized Estimating Equation) treat different cluster size?

I have a population of 200, 000+ patients and their hospital visit information. I'm trying to see if having a certain disease would have an effect on whether they will have readmission or not (this is ...
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12 views

Help: testing repeatability within a group, and conducting a PCA for observations within those perhaps-repeatable variables?

I'm trying to analyze behavioral observations of nesting birds within and across various field sites. I know that certain behaviors, such as latency to flight, amount of vocalizations, and defensive ...
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20 views

Analysis of pre-post data when 2 treatments given serially to same subjects

I have following data from a cross-over trial where subjects were given 2 types of treatments separated by a washout period. For each treatment measurement was made in pre and post treatment period. I ...
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23 views

Losing power by doing repeated measure instead of standard anova

I have an experiment with one within subjects factor. It has 3 levels: sleep deprived (24 hours), sleep deprived (12 hours), not sleep deprived. Over the course of 6 weeks we run a counterbalanced ...
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84 views

Repeated measures ANOVA: what is the normality assumption?

I am confused about the normality assumption in repeated measures ANOVA. Specifically, I am wondering what kind of normality exactly should be satisfied. In reading the literature and the answers on ...