Questions tagged [repeated-measures]

Repeated measures data occur when more than one measurement is collected on the same unit (e.g. subject). Use this tag for RM-ANOVA together with [anova] tag.

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Implementing permutation tests in randomized controlled trials with repeated measures

I am trying to implement a permutation test to use for testing treatment effects in a repeated measures RCT-design. Unfortunately I am having some trouble understanding how to design a correct ...
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Designing an experiment to compare how multiple SMOTE variants affect multiple classification models on multiple datasets

For a university paper I want to test a hypothesis that one particular SMOTE variant outperforms two other SMOTE variants. By 'outperforms' I'm looking at using the F1 measure. I want to test this ...
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What type of analysis to do for Dissertation- EMOTION RECOGNITION

In my study, participants take part in the State Trait Anxiety Inventory (STAI) where they are ranked into high or low trait anxiety groups. Participants are then shown multiple videos of 7 different ...
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Appropriate ways of analyzing the influence of two independent variables on a reaction time?

I have the following experimental data. The dependent variable is a reaction time which has been measured on n = 30 test subjects. The reaction time was measured six times per test subject and the ...
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Implementing a structural equation model in a within-between hybrid model

I am working on longitudinal data with three waves and have first utilized a hybrid probit regression model (within-between regression model). I have run the analyses in STATA using the following code:...
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Random forest for high dimensional data with repeated measures (the LongituRF package in R)

I have some high dimensional repeated measures data, and i am interested in fitting random forest model to investigate the suitability and predictive utility of such models. Specifically i am trying ...
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Repeated Measures with LMER: Include time as random effect?

I have a dataset of measurements of 29 patients across three time-points. The scenario can be easily simulated using: ...
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Sobel test for a mixed design experiment

Hi I have a mixed design experiment with 1 within subjects factor (4 levels) and 1 between subjects factor (4 levels). The following diagram shows a summary of the model that I am trying to test (...
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Test for difference of times in dependent data

This might be a question of within-group comparison in different situations but I'm not quite sure. The data are time lags measured by hour. I sampled lags from the same group of students. Each ...
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Investigating effect of group on difference scores in mixed ANOVA

I was wondering what is the most elegant way to investigate group differences in change scores? Here's what I'm trying to do. Imagine there are three groups (a,b,c) where each participant is measured ...
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Survival Analysis for data with repeated measures

I am trying to study attrition amongst students during their 3 year bachelor's degree. If I measure values of various features every semester over a 3 year period (or any other frequency), only some ...
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How to compare two groups with respect to the relative change in outcomes after treatment when there are two repeated measurements — pre/post test?

There are two groups of patients, say, young and old, and we want to determine whether these two groups of patients react differently to our treatment. Let $X$ be a continuous dependent variable, say, ...
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Statistical tests that can be run on differences between observations, including repeated measures?

I'm trying to figure out what stats I would have to use for my thesis. For my first experiment, I am planning on getting roughness values from grasshoppers and rocks (from 4 sites, 5 grasshoppers and ...
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Repeated Measures Moderation and Johnson-Neyman method with 3 within-subject levels?

This question is not immediately related to any specific dataset or analysis I'm doing, and is intended to be a more general discussion. I have recently learned that the MEMORE macro for SPSS by ...
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Mixed Repeated Measures ANOVA vs. multilevel random effects model

I have a dataset that contains survey responses from participants attending a training workshop. Surveys were administered prior to training, just after training, and 3 months post training. Moreover, ...
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How add a fixed offset term to account for a known effect in a repeated measures mixed model?

I'm running a lmer with a continuous outcome TestY measured in each visit a participant makes to the study i.e. a longitudinal repeated measures analysis. The ...
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Which conditions need to be checked for a MANOVA with repeated measures?

A friend of mine is writing her master's thesis in physical therapy and has a question about the repeated measures MANOVA model. I am asking this question here for her and hope someone can help her ...
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Clustered pre-post analysis dichotomous variables in SPSS

I’m not entirely sure how to analyze data we have from the following study: We trained three teams of health care professionals of three different palliative care wards We would like to analyze the ...
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Correlation between different variables drawn from different subjects from the same population because of destructive tests

I have an question if i can correlate different variables to check if they are dependent on each other, when the two variables are obtained with destructive tests, so the tests for each variable uses ...
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Comparing two, or more, independent paired t-tests

Can we compare the results from two, or more, independent paired t-tests? For example: I want to test if drug 1 and drug 2 are effective to reduce weight. I have a control group (that will consume a ...
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Time series (or Survival) analysis looking at effect of multiple policy changes over time

I'd like to look at the effect of lockdown policies(announcements) over time on features of the COVID-19 epidemic. I'm not very familiar with different time-series, so i'd like advice on what type of ...
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Survival analysis with repeated measures

I've recently started working on survival analysis, but I'm still new to the field. My dataset consists of a cohort of 50 individuals with advanced cancer for whom I have some blood quantitative ...
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Fractional, half factorial design (2^3−1 III , I = ABC) design: Sample size and within subject asignment

I need a little help planning a psychological experiment. We have three factors with two levels each. We are only interested in the main effects or rather simple effects (and possibly the moderating ...
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Which formula to choose for a mixed model / multilevel model

I'm trying to write a mixed model on repeated data, but I am having a hard time writing the formula. My database is composed of results of schools for different exams. Each line contains a result from ...
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Adding variable and value labels in SPSS across large number of variables

I have a longitudinal dataset with a large number of variables that require variable and value labels. All of the variables have a prefix (e.g., time1., time2., time3.), a suffix (e.g., .age,.sex, ....
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Repeated measures on individuals with the same outcome

I've attempted to tackle the following problem: When a customer has registered on our site, we'd like to predict if he/she will eventually leave us. I have 3 days' worth of data, that captures ...
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Between or within subjects?

So I have a 2x3 design with two categorical IVs, one is Country, the other is Message type (type A, type B, and control). I've found published studies with very similar design that do both in between ...
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When time should be considered a factor using ANOVA?

In a drug test experiment, we measure the effects of different concentrations of a drug on multiple subjects. The main variable we measure is the distance traveled by the subjects (one record per ...
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Measuring variability in blood pressure in a repeated measures design with different time intervals between study visits

I have repeated measures on blood pressure for a lot of patients, measured at different intervals (table below). I want my standard deviation to reflect that a large deviation in blood pressure ...
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linear mixed effects models: should I aggregate repeated trials?

A colleague of mine asked me to analyse some data from a movement experiment. Participants were asked to turn their head three times to the left (toL), three times to the right (toR), with both the ...
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Is there an R function for a robust three-way mixed ANOVA?

I'm a PhD student in the social sciences and I have run into some issues analyzing my dissertation data - namely, non-normality, and to a lesser degree, heterogeneity of variance. Specifically, I am ...
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accounting for standard errors when examining correlation between parameters

I have a repeated measures data set with about 100 unique individuals responding (50 responses per individual) that I am using to estimate two different models that each have one parameter. I would ...
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3 factors, one of them not fully crossed --> repeated measure?

I am not sure which statistical analysis to use for my data (in SPSS). I did not realize until the data was collected, what an odd design I had constructed... I would greatly appreciate your help! I ...
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How to calculate the sample size by using G*Power for repeated measure anova?

I need to calculate sample size by using power analysis. My experiment is a 2*3 repeated measures ANOVA which means there are 2 independent variables and each one of them has three conditions. I'm ...
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How to analyze the data for measuring multiply site from same patients? Repeated Measures Analysis of Variance (ANOVA)?

I am doing a study to evaluate the effect of ossification ligament on thoracic vertebra. The purpose was to explore whether the evoked potentials is different between compressed area and uncompressed ...
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Single subject anova

I collected walking speed data over 2 weeks for a single subject. These different walking speed were separated into 7 different groups based on whether they were extracted during a shorter or longer ...
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Is GEE the simplest choice for a 2x2 factorial design with repeated measures and binary dependent variable?

I have a 2x2 factorial design. Both independent variables are binary (age: young/old and condition: experimental/control). Age is between subject and condition is within subject. The dependent ...
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Repeated measurements of one set of samples before and after treatment?

Given a set of samples that are measured before and after treatment. The size of the treatment effect depends on the measurement value before treatment. However, the number of measurements per sample, ...
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Compare variability of a panel of measures collected at five different timepoints

I have a panel of 60 measures that have been collected from 14 people on 5 consecutive days I have a second panel of 40 different measures that have been performed under the same conditions. Ideally, ...
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How to calculate the slope per day using 3 measurements?

I have a dataset of 134 lung cancer patients who had an inflammatory biomarker measured at 3 time points before during and after therapy - we're trying to investigate if the biomarker is predictive of ...
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Similarity of N Dimensional Panel Across >2 Repeated Measures

Looking for some signposting really. Thanks in advance I'm trying to determine how useful a biomarker panel is. I've recruited 15 participants who have provided a sample on 5 consecutive days the ...
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Is pooling countries together or running a regression model for each country alone is more suitable for comparison?

My research questions are: Does the gap in earnings has changed between individuals with different educational levels between 2007 and 2010 (before and after the 2008 financial crisis). Does that ...
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Glmer two measurements, two groups, gamma distribution

i wondered whether this is the right approach for my data. I have two groups that completed a questionnaire twice (so two measurements for each subject). My data kinda looks like this: ...
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Is a repeated measures t-test appropriate for this scenario?

I am working with a dataset that involves participants taking a baseline test and a post-test. The company I am working with has the mean baseline score for participants from a year ago, and they ...
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How do I compare two sets of subjective exertion ratings given by treadmill runners at 8 time points during two experimental sessions a week apart?

Thanks in advance for your advice—here's a sample of my data for one participant to add context, also shown in a screenshot below. 2 running workouts were done on a treadmill. Exertion ratings (...
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repeated measures ANOVA or one-way ANOVA for a radiology study? [duplicate]

I am conducting a study on different image reconstruction algorithms for computed tomography (CT). My aim is to investigate which of the image reconstruction algorithms that have the highest signal-to-...
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ANOVA? MANOVA? repeated ANOVA? what test to choose for my purpose?

I'm having a hard time to choose the correct test that fits the study I conducted and if the general approch is correct. The test design is as follows (simplified): 10 different participants rode ...
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singular fit issue due to data structure in mixed regression?

I am trying to analyse the effect of agreement with various items and respective sentiment towards these items on election results. I have a probability describing how much the parties agree with the ...
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Odd sample size in GPower (Repeated Measures ANOVA, within factor)

I am going to conduct a pretty simple experiment: one within factor with 8 levels for a single group of participants. I'm trying to determine the apporpriate sample size using GPower based on an ...
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What do the “Corr” values under random effects section of the nlme output mean?

When I want to analyze longitudinal data with few observations, I implement it in the following way: ...

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