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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Error in ezANOVA [on hold]

I do a lot of mixed ANOVA (both within and between subjects factors) and have found the ez package very helpful for this. However, lately, it seems to have stopped ...
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Specifying 'subjects' and 'repeated' options in Linear Mixed Model (SPSS)

This question is probably quite easy to answer for those who work with Linear Mixed Model analysis. My question is the following: I have a repeated measures design, where each participant completes a ...
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8 views

Can I report Univariate results without multivariate results in MANOVA?

I have nonsignificant results for my multivariate analysis (2-way MANOVA with 1 RM). Keep in mind there are 10 DVs that are correlated. The univariate results show significant results for 1 of the ...
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7 views

Anova with 2 within subject factors

I did an experiment where I had 58 participants complete a computerised attention task. I measured their reaction times as a consequences of two stimuli, one of which took 3 different shapes, whilst ...
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2answers
12 views

Correlation between repeated (not time) measures and not repeated measures

I have to perform correlation test between repeated and not repeated measures, more accurately e.g.: I sampled 20 individuals in 10 populations and I measured some traits (e.g. height) on the ...
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10 views

Can I average successive independent data points in a repeated measures analysis

I had 13 subjects who performed the same routines in random order. Each routine though was done several times to make sure the recording equipment would pick it up - consequently, due to equipment ...
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1answer
33 views

Is a two-way repeated measures ANOVA appropriate for my study?

I have 20 students, but consider them as 10 pairs. They will be doing six different activities, where the aim is to find which of the activities produce the most spoken output in the pairs. ...
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16 views

Repeated measures mixed model with nested data

I have been trying to figure out how to run the stats I need for this study for weeks and despite reading endless amounts of information am not much the wiser! If anyone can help, I would be hugely ...
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3answers
522 views

Making up for a low sample size by increasing the number of observations

What exactly is the error that is made in the following judgement? "I cannot increase my sample size, so I'll make up for the low number of subjects by asking the subjects to perform more trials, ...
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16 views

a crossover repeated measure feed trial using R

I attempt to analyse a crossover feed trial using R but I`m not good at statistical analysis. My data contains 10 subjects, equally divided into 2 groups named A and B. Each group were fed with diet A ...
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11 views

Repeated Measurement question

I am a master students for sport science. We did a passive peak torque (PPT) test in 8 subjects. Each subject had 4 intervention (stay quiet, doing maximal voluntary contraction, hopping and ...
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18 views

Repeated Measures ANOVA SPSS

I have the following predictors: - 2 within subject factors - 4 between subject facors Theoretically, I'm mostly interested in the main and interaction effect between the 2 within subject factors as ...
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16 views

Correct test to test effects of time and treatment

I have a dataset consisting of 3 treatment levels (A, B and C) and a response variable (plant height). Each treatment has 10 plants. Each plant is measured twice, once at the beginning and end. I ...
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12 views

SPSS Generalized Estimating Equations (GEE) with 2 nested subject variables?

I have an intercept-only model with 1 dependent variable and 2 subject variables (participants and participant groups). Technically, the participants variable should be nested within the participant ...
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1answer
19 views

Limits of reducing error by multiple measurements

By making repeated measurements improved accuracy is possible. What is the theoretical limit of this improvement? For example, let's imagine I have a hydrophone array and am listening to a ...
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1answer
18 views

Repeatability estimation using a mixed model with repeated measures by four raters

I am a medical doctor and definitely not an expert in statistics, although I think I do okay and I am familiar with R. I have discussed the following issue with a statistician but I am still not sure ...
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17 views

Need help with coding 4 way within-subjects anova model in R

I am trying to perform a 4 way within-subjects ANOVA on my data and would like help with the coding in R. The design is a 2x2x3x2, and is hierarchically nested, where each subject gets a measurement ...
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9 views

Cross-Classified Random Effects: within and between subject predictors

I'm doing a linguistic experiment where participants have to respond to several items, so I have a cross classified structure where items are nested within participants and participants are nested ...
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1answer
18 views

successive difference (aka repeated) contrasts with reference group

I have data from an experiment where performance y on two different devices was measured over three successive sessions. The 2x3 design is completely within-subject (see simulation code at the ...
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31 views

Model for survival analysis with time varying predictors (panel data) and delayed effects

I collected behavioral data of more than 150 people, monthly, over two years. So for each of them I have 24 repeated measures over time. It occurs that after some months some of them get infected by ...
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23 views

Generate means and std. dev. in a repeated measures ANOVA

I got a repeated measures ANOVA with two timepoints (i.e. variables A1 & A2) as within-subjects dependent variable, and variable B as a between-subject independent variable. In the output (SPSS) ...
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20 views

Gaussian Process for periodic data?

Assuming that I have data with repeated measures (or, in other words, multiple time series of different realizations of the same process), can I train a Gaussian Process on this data? In fact, is ...
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18 views

Repeated measures regression with categorical and continous predictors

(This is a follow-up of a previous question of mine, and similar to this unanswered question) Scenario Say I have 30 subjects. On each subject, I have a number of categorical and continuous ...
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10 views

Whether repeated measure makes sense - churn analysis

We are currently engaged in customer churn prediction and analysis. We have to predict whether that customer will use any services in the subsequent month based on previous 4 months data. So the ...
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21 views

Advantage of a pooled Repeated Measures ANOVA?

Study Design: 2 (time) x 2 (condition) repeated measures design DV: Physical activity (i.e. walking/cycling/running; all measured in units of seconds, meters, and amount of steps) IV's: Time, ...
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7 views

main effect in 2-way ANOVA but not in Omnibus test

I ran a two-way repeated measures ANOVA, specifically a randomized block factorial ANOVA (design RBF-pq, with p=2 and q=3) in R. The factors were "mode" (with 2 levels) and "metric" (with 3 levels). ...
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1answer
29 views

Dealing with repeated measurements

I have the feeling that this is a very basic question, but I have never had any formal schooling in statistics and after extensive googling I feel I just can't come up with the right search terms. ...
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8 views

Picking the Right Co-Variance

I am conducting a repeated measures regression, in a linear mixed model. I am also analyzing the data with a general estimating equation. The dependent variable is continuous (a measure of arousal) ...
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4answers
60 views

Students answer the same test twice; is MANOVA appropriate to test if the performance increased?

A teacher gives a 2-question quiz to a class of 30 students once before teaching the subject and another time at the end of the class. (The same exact 2 questions are given at the beginning and at the ...
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40 views

How to perform a regression analysis on repeated measure data

I have two sets of data: A set of 100 observational variables for 10 subjects measured at three different time points Two performance variables for the same 10 subjects measured at the same three ...
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13 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 ...
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20 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 ...
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2answers
41 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 ...
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11 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 ...
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1answer
19 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) ...
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39 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) ...
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6 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 ...
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10 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 ...
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20 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 ...
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34 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 ...
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47 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 ...
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23 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 ...
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20 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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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 ...
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1answer
63 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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15 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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0answers
18 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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1answer
90 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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18 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). ...