1
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1answer
21 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
43 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
55 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
40 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
11 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
34 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
29 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
59 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
36 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
31 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
42 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
95 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
51 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
57 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
33 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
28 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
39 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
25 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
21 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
86 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
61 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
38 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
78 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
71 views
1
vote
0answers
20 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
181 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
113 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
60 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
45 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
922 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
343 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
125 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
115 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
64 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
81 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
224 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
369 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
101 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
257 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
161 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
361 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 ...
0
votes
2answers
100 views

Repeated Measures GLM / restricted permutations

I have a question regarding repeated measures and GLMs: Suppose i have counted the abundance of some species in lakes at different time points - every lake received a different treatment at time = 0. ...
0
votes
2answers
114 views

Interpretation of p-value for one-way ANOVA and two-way ANOVA

We are currently handling some results and performing some ANOVA tests on human search performance in virtual environments using different sound systems for audio rendering. We measure the time it ...
3
votes
2answers
363 views

How to deal with unbalanced group sizes in mixed design analysis?

I have 2 x 2 x 2 mixed design with two between subject factors (sex, organizer) and one within subjects factor (task). The group sizes of the 'sex'-factor is unequal. When I perform a factorial ...
0
votes
0answers
59 views

Contrasts for one factor in a repeated-measures ANOVA

I am trying to set custom orthogonal contrasts for a repeated-measures design using R. Is it possible to set contrasts just for one factor? The model looks like this: ...