MANOVA is the acronym for Multivariate Analysis of Variance. This is a generalization of ANOVA for the case where there are multiple dependent variables.
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“effects not estimable” error in R aov
I have data on the effect of treatment on leg shaking. I reused several individuals so I want to know
Is there a significant effect of treatment on shaking
Do the reused individuals present some ...
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How to extend multiple regression hypothesis tests to multivariate?
I have a basic multivariate regression model $\mathbf{Y}$ = $\mathbf{XB}$ + error
$\begin{bmatrix}y_{1i} \\ y_{2i} \\ \vdots \\ y_{ki} \end{bmatrix}$ =
$\begin{bmatrix} X_{11} & ... & X_{1p} ...
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1answer
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How to prove that Manova is a special case of mixed models?
I am writing my master's thesis in quantile multilevel regression.
My professor all of a sudden decided to change the subject of my thesis into something that could be called "quantile multilevel ...
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Two IVs (schools) and 3 IVs (grade levels in each) where there are 2 DVs (math and reading scores)
Is MANOVA the correct test? I am looking at 3 grade levels in each of the two middle schools. I want to compare the standardized scores (reading and math) of students in each grade level to the same ...
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2 x 3 Intervention Study Design
I have an intervention that I want to test and I am a little bit "statistically challenged." There will be two groups (treatment and control) over three periods of time (pre-test, post-test, and a ...
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27 views
Fitting Mancova model on factor scores
I have two matrices with multiple variables. The two matrices come from same sample.I would call them matrix A and Matrix B.Each of them have many correlated variables .
I would want to evaluate the ...
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39 views
Appropriate model to use - MANOVA?
I am new to this forum, but I have a question regarding the best way to analyze my data. The general setup for our experiment is as follows:
6 locations, 2 test sites per location (1 treatment, 1 ...
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Bootstrapping in ANCOVA AND MANOVA in R
I have a difficult one for strong solvers
Can anyone provide us please an example with coding in R of the bootstrapping method in ANCOVA and one in MANOVA
Thank you very much
T
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140 views
Which are the correct sum of squares for repeated measures ? (balanced example)
Below are three ways to fit a MANOVA model in R and to extract ANOVA tables from the fitted model. The design is balanced. All methods give different results.
The data are 5 groups of 4 individuals ...
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29 views
Which ANOVA method should I use?
I carried experiments of drying cotton seeds with three different mass flow rate of inlet air. For each mass flow rate air was supplied at three different inlet air temperatures.
I have weight loss ...
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56 views
How to perform a MANOVA with a random effect in R?
I performed an experiment where I raised different families coming from two different source populations, where each family was split up into a different treatments. After the experiment I measured ...
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210 views
G*Power-Repeated measures MANOVA “number of measurements” input field
I am trying to calculate the sample size needed with G*Power for my dissertation study. I will be doing a Repeated Measures MANOVA within/between interaction. My question is in the field "number of ...
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58 views
Is a MANOVA justified?
I have to analyze the data from a study in which two groups of subjects (total sample = 30) were tested on 4 cognitive tasks, all realtive to executive functions. For each task, I have accuracy score ...
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185 views
Sample write up for a repeated measures MANOVA using one IV and two DVs?
I have run a repeated measures MANOVA for my dissertation study in clinical psychology but am struggling a little bit with the proper write up. I have found several examples on the internet and ...
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66 views
Test for 1 IV, 2 DVs, with multiple samples from each subject
I have a set of data with 1 independent variable (IV, categorical), and 2 dependent variables (DV, continuous). Multiple samples were obtained from each subject with variable sample size, and one of ...
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293 views
MANOVA vs. Repeated Measure ANOVA
Thanks for your time.
I want to compare accuracy of several predicting models. I am comparing their MAE. each model use same all or some predictors. Which approach is better MANOVA or repeated measure ...
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107 views
What is the nonparametric variant of multivariate ANOVA with more than one one factor (and with interactions between factors)?
I analyze real data where assuptions of classical multiway (more than one factor assumed) MANOVA (more than one response variable) are not met (normality, equal variances). Is there any nonparametric ...
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How can I test for significance of a treatment in an unbalanced, repeated-measures experiment using R?
CrossValidated Community,
I must mention that I am a first-time poster (and relatively new to both modelling and R), so please excuse any norms I may violate in my post and politely inform me.
I ...
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168 views
Non-significant MANOVA with significant planned contrasts [duplicate]
Possible Duplicate:
Not-significant F but a significant coefficient in multiple linear regression
How can you have a non-significant multiple regression model w/ significant predictors?
...
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1answer
159 views
Repeated measures ANOVAs instead of repeated measures MANOVA w/ small N?
I have 3 variables that have been measured on 4 occasions and a sample size of 16. I was considering a repeated measures MANOVA to ascertain if the changes over time were statistically significant. ...
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503 views
MANOVA with repeated measures in R, error
I conducted listening experiment in which 16 participants had to rate the audio stimuli along 5 scales representing an emotion (sad, tender, neutral, happy and aggressive). Each audio stimulus was ...
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196 views
What is the “Main effect” in General linear model with repeated measures
For my bachelor thesis I used an General linear model in SPSS with repeated measures. The data is from a research project on emergent literacy I did with an eye-tracker. The 3 within subject factors ...
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424 views
Difference between MANOVA “post-hoc” tests of between subjects effects and between subjects one-way ANOVA?
When I run a 2x4x5x6 (Sex*AgeGroup*HighestDegree*Ethnicity) MANOVA (with 20 dependent variables) in SPSS, it presents tests of between subjects effects for each of the IVs and their interactions after ...
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How to compare first to second half of measurements in a counterbalanced behavioral experiment?
I want to compare measurements in two halves of a behavioral experiment to examine for learning effects. My first course of action is to split the measurements in the two halves and then repeat the ...
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98 views
Secondary data analysis; running MANOVA with one DV that has numerous variables
I am wondering if someone could help me. I am doing a secondary data analysis. My primary research question is a one-way MANOVA analysis, and the sub-questions are two-way ANOVAS. My question is ...
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46 views
Creating new variables to measure main effects and interaction with MANOVA
I have a repeated measures design (all subjects were in all conditions) with 4 conditions and a dv that can take 4 values (0 - 3). It was suggested to me to analyze this as a MANOVA and define the dv ...
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Is there a generalization of Pillai trace and the Hotelling-Lawley trace?
In the setting of multivariate multiple regression (vector regressor and regressand), the four major tests for the general hypothesis (Wilk's Lambda, Pillai-Bartlett, Hotelling-Lawley, and Roy's ...
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1answer
204 views
Variables which sum to a constant - ANOVA, MANOVA or none of these?
I asked a group of subjects to make a series of 12 binary choices regarding preferences.
Let's say for arguments sake, these were between ugly (ug), attractive ...
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1answer
150 views
What statistical test should be used to accomplish the objectives of the experiment
I'd like to have your feedback to analyze my data from the following experiment.
Experiment Information
A total of 30 (15 from one city and other 15 from another city) slaughtered animals were ...
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2answers
5k views
How do you report significant contrast results for a MANOVA in APA style?
Do you just report that MANOVA significance test is significant, or do you have to include contrast estimates (SPSS K MATRIX)? In the latter case, what are ...
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2answers
169 views
Two DV's in a 2x2 factorial experiment
I'm trying to investigate the effect on (a) tear resistance and (b) gloss of a piece of film due to additive and extrusion method. I can see that the best results for tear resistance is low additive ...
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2answers
664 views
Multiple dependent variables in factorial design
I have a 2x2x2 factorial design with two dependent variables (lets say height and weight). I can examine the effect of the three factors for each dependent variable separately. But I also want to ...
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1answer
570 views
Permutational MANOVA and Mahalanobis distances in R
In this paper
Anderson, M.J. (2001). A new method for non-parametric multivariate analysis of variance. Austral Ecology, 26, 32–46
I found very useful MANOVA approach that can, to some extent, ...
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1answer
2k views
How to interpret type I (sequential) ANOVA and MANOVA?
My primary question is how to interpret the output (coefficients, F, P) when conducting a Type I (sequential) ANOVA? My specific research problem is a bit more complex, so I will break my example into ...
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298 views
Over enthusiastic MANOVA in R
In recent research I pursue a MANOVA model on a dataset comprised of 50 measured characters and several grouping factors that I need to test. When I use something like this
...
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467 views
Understanding MANOVA in case of a single predictor
I'm trying to understand the statistical analysis I saw in a clinical study. They measured performance of 3 groups of subjects with a series of performance measures (A, B, C, ..., N). The objective ...
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122 views
Dealing with nuisance variables in a MANOVA situation
I have a study in which participants facebook profiles were rated by a group of students. The participants were then randomly allocated into one of three groups: the uncertain condition (where they ...
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255 views
Is VAR a MANOVA with auto regression?
What are the differences between VAR (vector auto regression) and MANOVA?
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1answer
2k views
How to examine differences between two groups across three different experimental conditions?
I have data for two groups. The 2 groups are matched on a number of variables, but differ in the scores on an alcohol measure (one group is high, and one is low). However the groups have been created ...
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Does the importance of the normality assumption in MANOVA decrease as sample size increases?
Does the importance of the normality assumption in MANOVA decrease as group sample size increases?
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1answer
123 views
How to develop a model predicting quality of life from a wide range of demographic, stress, and health measures?
Context:
I am running a large survey and am trying to figure out what statistical analyses to perform.
The survey asks questions in every format known to man (e.g., likert scales, multi-choice, ...
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286 views
Non-normality in MANOVA with significant planned contrasts versus non-significance in Kruskal-Wallis- A Conundrum
I am conducting a between groups analysis for 3 groups (n=26, one control group and 2 experimental groups)with 4 dependent variables. I initially planned to conduct a MANOVA, however I am not meeting ...
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2answers
4k views
Differences between MANOVA and Repeated Measures ANOVA?
What is the difference between a repeated measures ANOVA over some factor (say experimental condition) and a MANOVA?
In particular one website I stumbled across suggested that MANOVA does not make ...
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931 views
How to deal with non-normality in MANOVA?
The dependent variables (DV) have to be normally distributed. I have a problem because some of them aren't. I have one independent variable (IV), namely type of education. The DV's are Externalizing ...
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1answer
419 views
How to describe a design with a mix of experimental conditions, predictor variables, and multiple outcome variables?
My research design is as follows:
I have these Between Subjects IVs:
Experiment Condition - 5 levels
Facebook User status - 2 levels (yes/no)
My supervisor also wants me to see if there are ...
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268 views
Questions about contrasts for MANOVA
I have a multivariate dataset with a test group and three control groups. I was thinking that the best way to determine if and how the test group differed from all of the control groups would be to ...
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272 views
Tutorial for performing Contrasts for MANOVA
Context
I have a multivariate dataset with a test group and three control groups.
I was thinking that the best way to determine if and how the test group differed from all of the control groups would ...
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1answer
4k views
Multivariate multiple regression in R
I have 2 dependent variables (DVs) each of whose score may be influenced by the set of 7 independent variables (IVs). DVs are continuous, while the set of IVs consists of a mix of continuous and ...
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1answer
473 views
Is MANOVA the correct way to handle multiple response variables that are additive?
Context:
I am trying to analyze an experiment on plant community response to two treatments. Here’s a simplified description of the experiment, there are a few extra complications in reality.
...
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2answers
490 views
Repeated measures with correlated measures (not time)
Most repeated measures ANOVAs have time as the repeated measure; I was wondering about using a repeated measure that is not time.
Say we fed two groups of animals different diets. At the end of the ...
