0
votes
0answers
5 views

Joint model for ordinal repeated measures data and MNAR dropout using R

I have a dataset consisting of repeated measures data of graded toxicity scores (0-4) in a large number of patients being treated with a anti-cancer drug. We would like to identify predictors for ...
0
votes
0answers
16 views

Two-way Repeated Measures ANOVA with replicated measures

My experiment involves 16 participants with a dependent variable (PP) tested under 2 conditions, across 3 different time-points. At every time-point, each participant is tested twice. My data is ...
0
votes
0answers
40 views

repeated measures ANOVA, crossover trial, R

I am sorry for stating such a question. Unfortunatelly, it's very-very hard to go through all statistics. I have a crossover study design with 3 treatments, 3 periods, and a baseline (covariate). The ...
2
votes
1answer
82 views

Mixed, repeated measure model specification and results interpretation using LMER in R

I am working with data from a computer task which has 288 total trials, each of which can be categorically classified according to Trial Type, Number of Stimuli, and Probe Location. Because I want to ...
1
vote
1answer
22 views

Is it possible to measure the independent variable with part of the dependent variable

I have Beta as my independent variable and Economic value added (EVA) as my dependent variable. To calculate EVA I need to use Cost of capital and to calculate that I have to use Beta, so is it ...
0
votes
1answer
49 views

Two-way repeated measures ANOVA with unbalanced data

I have a system / operator repeated measures data set for which I would like to answer the questions: is system 1 quicker than system 2 is operator 1 quicker than operator 2 does the order of using ...
0
votes
0answers
26 views

Getting unexpected lme results

I am evaluating an experiment in which subjects had to rate quality of audio files. The design of the experiment is repeated-measures. So I'm trying to figure out which factors have an impact on ...
1
vote
1answer
57 views

How do I perform this complicated ANOVA type analysis in R?

I have the following type of dataset: | | | variable_r | subject | gender | age_group | Cond_1 | Cond_2 | ...
0
votes
1answer
41 views

comparing a variable (that is repeatedly measured) between groups in R

I have a rather simple question (I hope) but for some reason I can't find the right/ a working answer anywhere on the web. For my research I have measured mood on a scale 1-10, 6 times a day for 5 ...
0
votes
0answers
13 views

Oddly structured data - longitudinal data struggle - Interaction testing

I'm struggling with an analysis and I'd like to have your contribution. I work with neuroimaging, and I have tested the capacity of a certain imaging parameter (let's call it A) of predicting a ...
1
vote
0answers
45 views

Repeated measure two-way ANOVA (non-parametric)

Non-parametric ANOVA – a hot topic that is unanswered. There are many questions on this topic online. However, they all seem to end in a debate and no definite answer or clear explanation (that I ...
0
votes
0answers
37 views

ANOVA to find subjects that responded significantly different between treatments

I have a dataset composed of several subjects exposed to two different treatments (treat) in three distinct times (test), and I am interested in highlighting which subjects have significantly ...
0
votes
0answers
30 views

Understanding ANOVA formula in R and choosing the most appropriate model

I am new to R (and by extension statistics), and am having a tough time in making sense of this repeated measures ANOVA formula, please bear with me. I think I understand what the formula implies, but ...
0
votes
1answer
76 views

Repeated-measures, crossover analysis using linear mixed model in R

I have a data set that I am attempting to analyse in R and I am relatively new to the environment. My full data set contains 7 subjects (represented by Subject), that all receive 3 treatments ...
1
vote
0answers
37 views

Odds ratios from logistic regression on subsets of data using R

I have 15 subjects each with 200 trials & I'd like to run separate regressions for each subject. If I just run the regression on the whole dataset I am able to generate odds ratios / confidence ...
0
votes
0answers
41 views

Analysis of repeated treatment design (Linear panel model vs. ANOVA)

General information Assume you have the following quasi-experimental repeated treatment design (T = Treatment, M = Measurement): ...
1
vote
0answers
68 views

MANOVA for mixed model with multiple repeated measurements

I struggle performing a MANOVA for a mixed model. I have the following columns: S - subject (1,...,N) B - in between group (B1, B2) W - repeated measurement - within (W1, W2) M - measured dependent ...
4
votes
1answer
123 views

Longitudinal item response theory models in R

I'm trying to fit longitudinal item response theory (IRT) models in R. I have a test that was administered at multiple measurement occasions. I'd like to examine individuals' growth curves of factor ...
1
vote
0answers
54 views

Using repeated measures anova: Am I right?

We have just finished an experiment, where we had samples distributed into 6 groups and each group receiving a different treatment. Each group had 5 samples, with 20 replicate measurements taken per ...
1
vote
0answers
63 views

Is this longitudinal data too complicated for GLMM or GEE?

After writing this post, I've realized that I am running around in circles, chasing my tail. Any help approaching this problem would be greatly appreciated, as I think I just need to bounce ideas ...
1
vote
0answers
21 views

Remedial-level help needed on repeated measures analysis in R

I am very much a novice and really looking for some help. Following advice from a colleague I tried positing this on Stack Overflow but was told I was off topic and should post it here. I'm not trying ...
1
vote
0answers
34 views

What is the equivalent of a repeated ANOVA using a mixed effect model with lme?

I have a data frame with this structure: ...
0
votes
1answer
29 views

Repeated measures design with measurements from different groups of animals

In a repeated measured design we measure a particular variable at different time points from the same subjects. In animal experiments, if animals are sacrificed at every time point to measure a ...
0
votes
1answer
40 views

fitting LMEMs for repeated measures with no correlation between intercept and slope

For a simulation study, I contrast the power of different LMEMs for repeated measures. To get p-values, I use likelihood ratio tests where I compare a model including a fixed treatment effect with one ...
0
votes
0answers
30 views

One Factor Repeated Measure, Two Way ANOVA

Is there some way in R to output not only the main effects and the interactions of the two factors using an aov() like function but also the variance of the subject within a non-repeated factor? For ...
1
vote
0answers
32 views

Should I control for random effects of participant in an individual differences design?

I'm trying to analyse a survey study in which I'm interested in the way that individual differences between my participants influence how they respond to my stimuli. The stimuli are pieces of writing ...
1
vote
0answers
109 views

simulate multi-level data for repeated measurements

I am trying to simulate multi-level data for repeated measurements. My design includes just one within subjects factor, no between-subject factor. Consider the case of three treatment conditions with ...
1
vote
0answers
74 views

lme vs lmer vs aov for three factor repeated measures design

I'm trying to run a tree-way repeated measures ANOVA on the following data: I have a completely balanced design with three within-subject factors (type, form and ch - channel) and one dependent ...
0
votes
0answers
46 views

Analysis of a mixed design with categorical and continuous variables

I have no idea how to do the following analysis for an experiment. For my independent variables I have two continuous between-subject variables (personality traits scores), one categorical ...
0
votes
1answer
79 views

Tests of within subjects contrasts in R

I have run a split splot model in SPSS (via repeated measures function) and I would like to reproduce my results using R. To do so I used ezANOVA function from ez package to obtain sphericity tests ...
2
votes
1answer
74 views
1
vote
0answers
21 views

Pre-stimulus baseline removal in R

I have the following scenario: trials were conducted where participants were exposed to multiple stimuli during the course of a trial a specific physiological response was continuously recorded ...
0
votes
0answers
33 views

Proportional data with multiple responses

I am trying to analyze a data set in which the response variable is a proportion that can range from 0-1 (inclusive). This response was measured from the same individuals under four different ...
0
votes
1answer
37 views

How Can I Simulate Repeated Significance Testing in R

I work in marketing, frequently running A/B tests on websites to determine which variation is best to serve to site visitors. I would like to be able to run a simulation that highlights the perils of ...
4
votes
1answer
218 views

R gls() vs. SAS proc mixed with interaction: Why does R complain about a singular matrix when SAS does not?

I like to keep analyses all in SAS or all in R when I can help it and lately have been using R more and more, but there's one analysis that I do somewhat routinely that has given me trouble in R. I ...
0
votes
0answers
130 views

testing differences between levels of a factor in a linear mixed model

I'm trying to wrap my head around using a linear mixed model and appropriate post-hoc tests to determine if there is a significant difference between various treatments in an experiment I inherited. ...
0
votes
0answers
63 views

Repeated measures logistic regression

I have a dataset that features a binary outcome, a binary predictor, and an unordered factor with 7 levels, and 120 subjects. Each of the 120 subjects were asked a binary question on seven issues, ...
0
votes
0answers
53 views

ANOVA in lmerTest for in-between study with repeated measurements

I have a bit of trouble understanding how to formulate a correct formula in R using the lmerTest-library. Let’s assume there is an 2x2 in-between design with repeated measurements. Those repeated ...
7
votes
2answers
1k views

R lme4: how to apply binomial GLM to percentages rather than yes-no counts

I have a repeated-measures experiment where the dependent variable is a percentage, and I have multiple factors as independent variables. I'd like to use glmer from ...
7
votes
2answers
359 views

How to compare measurements and uncertainties made with different measuring instruments?

I have two different measuring instruments, A and B, both measure the same physical property $x$ of an object but with different "quality": B gives measurements with a known uncertainty while I do not ...
3
votes
0answers
137 views

Simulation for power analysis for higher order repeated measures ANOVA

I am attempting to find a way to perform a power analysis for a higher order repeated measures ANOVA where all factors are within-subjects (i.e., there are no between-subjects factors). I have looked ...
2
votes
1answer
126 views

McNemar's test for $3 \times 2$ data

I adopt a within-group experiment, such that the same participant uses 3 devices to perform a task, which has a result "pass" or fail. My data looks like this: ...
1
vote
1answer
65 views

How to test whether the effects of predictors on one DV explains their effects on another in a mixed ANOVA in R

I have data from a psychology experiment in which instructional method was manipulated between subjects via two factors: pretraining (3 levels) and training (2 levels). I assessed participants' ...
2
votes
1answer
84 views

Multi-Level Model with two scores per level 2 unit - reasonable analysis?

I have an experimental design with attitudes toward one positive and one negative stimulus nested within individuals. I also have a continuous predictor at the person level (a personality construct). ...
2
votes
1answer
251 views

How to specify mixed ANOVA with multiple repeated measures and covariate in R

Working in R, how can I specify a mixed ANOVA with multiple between- and within-subjects factors in such a way that it's amenable to adding a covariate in a subsequent analysis? Also, ideally, I would ...
4
votes
1answer
381 views

Unable to fit repeated measures in R

I've been trying to fit a repeated measures model in R using lmer but I get an error message. I've used SAS in the past and I was able to fit a somewhat similar ...
0
votes
0answers
113 views

Group-Time interaction from MANOVA in R?

I'm practicing MANOVA with R. I have a data (perhaps famous) called 'rat-weight data.' ...
1
vote
1answer
272 views

Power analysis of repeated measures ANOVA using simulation in R?

I would appreciate another opinion on this simulation approach to estimating power for a within-subjects (or repeated-measures) ANOVA; in this case a 2x2 factorial design. In other words, is there ...
0
votes
0answers
176 views

Running a Tukey's test on a repeated measures ANOVA in R

I've come across several posts dealing with post hoc tests of Repeated Measurs ANOVA. I came up with the below code in R to attempt this, but considering some of the posts on this subject I wanted to ...
0
votes
1answer
428 views

Specifying contrasts for lme in 3x3 repeated-measures design

I would like to test the effects of two categorical variables, each with 3 levels, on some continuous data. Three groups of participants completed the same task for 3 types of stimuli, so it's a 3x3 ...