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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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Is it possible to fit repeated measure data to Gaussian density curve

I collected my data (insect biomass) fortnightly from the same trees (six trees) from February to August. The biomass curve looks like Gaussian density curve. I know that I can use optim() to fit the ...
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Propensity Matching in Longitudinal Studies (with independent participants)

I am trying to generate a set of matched samples from a longitudinal study. However, I would like the matched pairs to be from independent individuals, and as soon as a pair of samples are selected, ...
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Hypothesis testing with repeated measurement on same population and with non-overlapping partitions per case

Having a population of $N$ individuals, I calculate an outcome variable $y$ for those who have a characteristics $x$ and those who don't have $x$ as a characteristics. This partitions the N ...
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mixed effects model in repeated measurements

My question is conceptual. Suppose $n$ patients, where each one is measured at 4 different time points. The outcome is continuous. The patients are randomly assigned to two groups, intervention yes/no....
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Analysis of time series data with multiple dichotomous predictors and proportional responses (no repeated measures)

I have a dataset which I am not sure how to analyse (or if there is any possibility at all). My experiment is a typical degradation study where I applied a substance to soil and measured what happened ...
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What test can show agreement between 2 large sets of repetitive data?

So basically i've measured a force that is dependend on an angle, and iv'e measured it a about 50 times. After that I changed something on the set-up and measured it again about 50 times. I checked ...
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Is Repeated Measures ANOVA appropriate for flower production over time?

I wanted to check here to see if a repeated measures ANOVA would be a good option to analyze my data, or if you have any other suggestions? I have read that GLMM is another option for time series data,...
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Cross-classified longitudinal model in R

I am trying fit an unconditional means model for longitudinal (i.e., repeated measures) cross-classified data in R. I have business segment-year observations for each business segment (SID) within a ...
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single measure of a fixed factor for each level of a random effect

I have a population animals, and am looking at the effect of (yearly) environmental temperature on date of birth and litter size. Births in the population have been monitored for 15 years (one litter ...
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One way ANOVA or one way repeated measures ANOVA?

If I measure students' output performances on the same activity with different time intervals, i.e. 1 hour, 40 minutes and 20 minutes and want to know if there is a significant difference between ...
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generalized linear models two within-subjects factors

I have two within-subjects factors A and B. Each participant undergoes all combinations of A and B. Now I am interested whether A or B or their combination can explain my DV (C) which is coded 0 and 1....
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How repeated measures ANOVA is affected by unequal number of observations in each of the conditions?

I have a repeated measures design with 3 conditions. In condition A there are 150 observations for each participant, in condition B I have 20 observations for each participant and in C I have 200 ...
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Nested mixed model with longitudinal data and variables with very few observations

I am doing my first data analysis and I have a hard time translating the experiment design to the model I want to fit. I have a couple of basic questions about the overall coding of the model, and a ...
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Multiple Comparisons, Risk Models

I am planning to do a survey which collects information on four predictors of crime using Likert scales along with demographics. Some of the demographics are categorical. The response variables are ...
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Linear mixed-effect model set up for non-repeated measures time series

I have the following experimental setup: A: 3 different treatments: Low, Mid, High concentration of toxin B: 27 identical plants, 9 randomly assigned plants to each treatment C: At days 1, 2 and 3 ...
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Repeated measurements graph per individual [migrated]

I have a question about how to draw subject specific graphs with longitudinal data in R. My data has the following format: ...
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Repeated measures, multilevel regression or another type of analysis?

I'm doing an experiment for which I've distributed a survey. People were asked in this survey to rate the attractiveness of 5 other people. I provided four groups of pictures and 1 of those groups ...
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Can I do it through Repeated Measures ANCOVA? If so, how can I interpret the results?

I'd like to have some help, please. I'm writing my masters and I have a huge doubt about which test should I use. What I want to measure is: the effect of therapy on people who have and don't have ...
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Difference between cross-over and repeated-measures designs

I know that a cross-over experiment (of any number of treatments/levels) necessarily has a repeated-measures design, but that not all repeated-measures designs are cross-overs. However, I wasn't able ...
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Paired t-test or repeated measurement

I am designing RCT in the same patient (treatment on one side of the face and control on the contralateral side of the face) The RCT will be 1 month long with measurements happening at 2 and 4 week ...
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Including covariates in a mixed model (lmer)

I would like to know if there is a significant effect of condition on Score1, and how closely correlated Score2 is at approximating Score1, for the following dataset: I am using a random intercept ...
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Profile analysis for within group design?

So I have an experiment with a within-subject design that has two conditions with an independent variable (with 10 states) and one dependent variable. An analysis of variance gave me already the ...
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4x2 within-subjects ANOVA power analysis to detect sample size

I am planning a research experiment with a 4x2 within-subjects design, and am currently trying to determine an appropriate sample size for my project (in order to achieve desired power with an effect ...
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ANOVA with two factor within subjects design

So i'm currently frustrating about this method of doing a two-factor repeated measures within subject anova (AxBxS-Design). As there is no straight forward way of using a simple scipy call for my ...
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What is the appropriate analysis for this type of repeated measures multi-binary data?

There is a popular theory within psychology that certain emotions will trigger "prototypical" facial expressions defined by the simultaneous contraction of specific facial muscles. For example, if a ...
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Repeated measures factorial assessed using planned contrasts

I have dependent data that can be arrayed as a factorial. I understand that although factorials can be assessed through ANOVA, it is not necessary or always desirable to do so. A second option is 1-...
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Compute Becker's (1988) standardized mean change based only on difference score and t-statistic (meta-analysis)

In my meta-analysis, I'm combining independent-sample designs with single-group pretest-posttest designs. To ensure interpretability across designs, I would like to quantify the effects from pretest-...
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Comparing two groups over time GLM or non-paired t-test - biostatistics

This might be a very basic question, but I keep getting different answers, so I'll ask it in this forum of experts :) Material: Back pain prospective cohort study of n=200 patients all suffering from ...
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How to correctly plan for Missing Data in Longitudinal / Repeated Measures Design?

Using an hierarchical questionnaire for a longitudinal study, I face strict constrains in how many items can be processed by each subject per week. The questionnaire contains 51 Items in total, but ...
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Calculation of relative performance gain

I want to measure the improvement of students using exam marks of semester 1 to semester 3. The following detail should be considered when calculating the measure; If Student A get 30 (sem 1) and 50 (...
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How do I formally test outliers from a linear regression?

I have a set of data that looks at the area of remaining retina against age. I have three points of data per patient. We know that over time, the area of remaining retina decreases exponentially. I ...
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Specification of mixed model with incomplete factorial design

I have subjects that will be exposed to a treatment. These subjects will be evaluated in four distinct periods (seasons). We distributed these subjects into four groups: Subjects that will NOT be ...
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Including predictors with HLM

I have data from healthy controls and patients that I plan to use in a multi-level model. I am comparing how mindfulness improves performance on cognitive tasks in healthy controls and patients. ...
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Protocol comparison: repeated measures ANOVA and mixed linear models

This is my first experience with repeated measures ANOVA and mixed linear models. Since I did not found an example that uses a design similar to my experiment, I hope I can get some help. I collected ...
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which kind of statistics for continous variables

I have one sample composed by 18 subjects. I measured the performance of a game and the fatigue before and after going to sleep and before and after a certain wake condition. So, I have game scores ...
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Inter- and intra-observer agreement based on regression coefficients

I have a following study design for a group of people looking at a picture: Ordinal outcome variable - based on picture, how sure you are that A is true from 1 to 5 Binary predictor - a golden ...
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RM one-way ANOVA or Friedman test

I here my question. I'm testing with n=6 animals in 6 different situations. It's repeated measures because all 6 animals did the same tests. When I do the column statistics to see if the distribution ...
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General Procrustes Analysis - Appropriate Statistical Test for Repeated Measures

I have a question regarding General Procrustes Analysis (GPA) and was wondering if anyone has any advice. I am trying to test whether my data collection method is replicable between researchers. I am ...
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How to compare 3 dependents conditions?

I have the result of an experiment for N subjects. The experiment results in 3 possibilities, the subject choose A, B or C. For each subject, the experiment is repeated 10 times. So I have ...
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Most Appropriate Post-Hoc Testing for 4-Way rmANOVA

I'm a little confused as to the correct or most appropriate way to conduct my post-hoc testing for a 4-way rmANOVA I'm running. Specifically, how to go about testing the main effects. Given an ...
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PCA with high amount of repeated measures

I want to create a system that can automatically evaluate a session as success or a failure. Each session generates a lot of data points, and thus I want to start my modeling with dimensionality ...
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Why does regression model theory not use measure-theoretic sigma-field type notation but counting process models do?

I have been studying counting process theory for time to recurrent event processes and am interested in the explicit use of the conditioning set in the model notation; $$E[dN(t)|\mathcal{F}_{t^{-}}]=\...
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What kind of test has multiple within-subjects factors ONLY and what variables do you need to simulate the test for a power analysis

I need to run a power analysis in order to discover a sample size for an experiment. The majority of experiments our lab runs are repeated measures studies that use no between subjects variables but ...
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Using binary variable with low variance in logistic regression

I am trying to design a repeated measures study where a person makes a choice (yes vs no). On the next trial they are asked to make a yes vs no choice on a different question. I want to test if the ...
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R Doubly Repeated Measure and specify Covariance Structure [closed]

Is there a way to do doubly repeated measure analysis in R? Suppose I have a dataset like ...
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What model to use with repeated measures of count data with a factor and a covariate?

My design involves three dependent variables. They are count data: frequencies of certain words used in a 20-min conversation. They're also repeated measure: the same subjects engaged in three 20-min ...
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Discretize values/binning for missing data

I’m running an experiment where pairs make ratings after answering questions. There are 15 minute intervals where they attempt to answer 12 questions, but each pair makes it through a different number ...
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Writing statistical analysis for Thesis (two tailed vs. one tailed)

So I'm writing the statistical analysis part of my thesis. Should I mention if the tests were two-tailed or one-tailed? The tests I have used are: ...
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Different results for ezANOVA and aov in R

I'm trying to carry out a 2 (between-subjects: native, non-native) x 3 (within-subjects: £1 offer, £2.50 offer, £4 offer) mixed ANOVA, however, ezANOVA() and aov() seem to provide different results; ...
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Should I include a fixed effect with repeated measures in the random structure of my nested linear mixed model?

I am doing a longitudinal repeated measures study looking at the effect of age (maturation) on my test result (Y - a type of hearing test). My outcome Y, is numeric, and is tested at 11 frequencies (...