Multivariate ANalysis Of VAriance (MANOVA) is a generalization of ANOVA for the case with several dependent variables.

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Comparing two groups with different size on multiple continuous variables [duplicate]

I want to compare two groups on 9 continuous variables to see whether mean scores on these variables differ between the two groups. However, my samples have a very different size: one group includes ...
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Planned Contrast after MANOVA and RM ANOVA

Im not sure I will get much help on this but this is a last resort. DESIGN I have 2 Independent Variables: 1) Group (Experimental and Control) 2) Time (Baseline, Post-Intervention, Follow-up) I have ...
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DFA in SPSS: Sorts effectively, but Box's M is still 0.000. Is the analysis worthless?

I am a geologist attempting to apply the discriminant function analysis to surface features I have mapped in ArcGIS. At the moment I have 4 dimensionless sorting variables calculated for each feature, ...
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20 views

Can longitudinal studies ever be treated as having independent observations?

This may be a dumb questions, but for sake of statistical analyses I'm wondering if the data of a longitudinal study can ever pass the assumption of having independent observations? For example, I am ...
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How to interpret P-value from mixed model and P-value from overall ANOVA?

I fitted mixed effect model with several effects with lme package in R by command ...
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How to best analyze a Semantic Differential?

1) How do I code the data gathered from the dependent var (PQ) below in excel for analysis in SPSS? I know how to run an ANOVA afterwards. N=60; Legend: 1 and 7: (extremely), 2 and 6: (moderately), ...
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Research Design Strategy

The total number of participants in a study is 70. This sample is divided into two groups. Group A (35 participants) and Group B (35 participants). The purpose of the study is to investigate the ...
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50 views

T-tests, manova or logistic regression - how to compare two groups?

I'd like to check whether women and men differ on those five variables, that can be correlated with each other. The groups are also not equal with 589 females and 293 males. The solutions that come ...
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30 views

Proper regression method for multiple continuous independent and a single continuous dependent variable?

I have 3 continuous (actually ordinal) independent variables and a single continuous dependent variable. I'm trying to sort out which regression method I should use in this case. MANOVA appears to ...
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21 views

Kruskal Wallis or Manova

I have to analyse 8 independent variables (IV) toward 8 dependent variables (DV) in my research. The IV is nominal while DV are ordinal (likert-scale). I run the normality test and the result is zero ...
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Statistical analysis of groups with reversed treatments and control groups

I have a quasi experimental study with three groups of students. One group received no treatment, only pre and post test observations on two units of instruction. Another group received treatment A ...
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The same participants completed survey three times, how many cases do I have?

I have total 22 participants in my treatment group, I have three DVs, and I asked my participants fill out the survey three times (beginning, middle, and the end) throughout of the treatment. I want ...
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How to determine trend in Achievements before and after an event?

I have the following data-set for a lot of persons (only 1 person being shown here) Actually the dataset has 4 levels, each level being a roll up of the original dataset A <- being rolled at a ...
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Why do the results of a MANOVA change when the order of the predictor variables is changed?

So, for example, using the Iris data and treating iris species as the predictor variable and sepal length, sepal width, petal length, and petal width as the dependent variables we get MANOVA output ...
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38 views

MANOVA or Mixed ANOVA? Several measures as dependent

I am trying to analyse data of 2 different groups (control vs experimental, brain damage) and their performance on 3 different cognitive tests (the results of which are not correlated) to determine ...
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50 views

Correct way to perform a one-way within subjects MANOVA in R

Note: This question is heavy on R programming, but it was recommended that I post it here after I posted an almost identical question in StackOverflow Main Question I'm looking for help correctly ...
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43 views

Nonparametric MANOVA for paired samples

I have a Test group(~ 20 subjects) and Control group (~ 20 subjects) on whom 10 sets of measurements (10 Dependent variables - DV's) exist before treatment. Post treatment (on the Test group) the 10 ...
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Is MANOVA the correct analysis for this case?

During an experiment I presented participants with some sound stimuli and I asked them to modify two parameters of the sound (Centroid and Sound_Level_Peak) to reach a given experimental goal. The ...
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Complex Factorial Manova in R/SPSS

Hello I have been struggling for many days with this problem. The situation and data set are following. The data set comes from an experiment that asked subjects (ID) to compare several CVs on ...
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31 views

F.model doesn't make sense to me in adonis, vegan package

I am having some trouble with adonis (vegan), and I don't think it's my data that is causing my head to go around. I ran the example code on the help page, which uses the dune data set. ...
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Grouping data in R for lack of fit test

Suppose we have a SLR $Y=\beta_0+\beta_1X$, to conduct F-test for lack of fit, we need to group $(X,Y)$ according to the $X$ value. The following code can group $X$ and finish the test: ...
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Two sets of % figures - which test to use?

I have two sets of data, and would like to know which test to use to best analyse. I have 28 records (each is a country) - For each record I have two categories (each comprised of three variables): ...
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2answers
60 views

showing the estimator of $\sigma^2$ [closed]

Let's take a one way ANOVA Model as $Y_{ij}=\mu + \tau_i +\epsilon_{ij}$ $i=1,2,3$ and $j=1,...,n_i$ and $\epsilon_{ij} \sim N(0,\sigma^2), \ \ \ \forall (i,j).$ Sample variance for factor ...
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RM-ANOVA alternatives for non parametric data

I have the following experimental design. 1 treatment with 2 levels ("UT" and "TR") 20 animals per treatment level 30 time measurements from p1 to p30 Details: p1 and p2 are stimulation periods ...
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49 views

Negative Pseudo-F value in Permanova / NPMANOVA?

I am using PAST v3.09 for Permutational / nonparametric Multivariate ANOVA. I am getting negative Pseudo-F value for the interaction and I was wondering if someone could help me understand what a ...
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ANOVA of d' (d prime) and the potential issues therein

Repeated measures ANOVAs of d' (d prime, or sensitivity) are common in a wide range of literatures. This being said, d' is distributed roughly exponentially, and therefore violates the assumption of ...
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MANOVA and Multivariate Regression: Related as ANOVA and Regression?

If I wish to find the relationship between a continuous independent variable (IV) and a single continuous dependent variable (DV), I can conduct a regression (or a correlation, as there is only one ...
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33 views

MANOVA for linear combination of negatively correlated DVs?

Does it make sense to conduct a MANOVA for linear combination of negatively correlated dependent variables? I have two different proteins (Protein1 and Protein2). I manipulated these two proteins in ...
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67 views

How to find more correlated variables to group them together using multivariate analysis in R?

My dataframe consists of both categorical and numerical variables. The target variable is categorical. The data frame also has substantial missing values where I cannot omit them or use any suitable ...
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87 views

What is PERMANOVA and when to use it instead of multivariate ANOVA?

I have some data on spatial and temporal variation of macrobenthic species. I tried to test the difference between seasons and sites, and noticed that PERMANOVA is recommended in the literature. (But ...
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37 views

Manova or Linear mixed models

I’m a newbie in statistics and R, so I hope that my question isn’t too banal for you. I’m going to carry out an experiment in order to verify whether cortisol and Hemoglobin levels are different ...
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29 views

Manova or Linear Mixed model?

I’m a newbie in statistics and R, so I hope that my question isn’t too banal for you. I’m going to carry out an experiment in order to verify whether cortisol and Hemoglobin levels are different ...
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56 views

manova for likert scale questions

I have 9 questions on five-point likert scale, and three groups of participants. I wanted to check those three groups differ in terms of their answers to the 9 questions. Originally, I was thinking ...
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Which flavor of (m)anova on PCA scores for this design?

I designed an experiment to test the stability of an new instrument, and also check my students' consistency. Now I'm not sure which flavor of (m)anova to use to analyze it. A large quantity of ...
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Covariate is related to independent variable, and also manipulated

I'm studying players inside a game. My covariate is "bonus coins". In condition A, bonus coins is always 0. In condition B, bonus coins is always > 0. Bonus coins in condition B spawn at random ...
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MANOVA shows significant main effects only but ANOVA shows both main and interaction effects

I have five DVs that are correlated, so I ran a 2x2 MANOVA, which showed a significant main effect. But follow-up univariate ANOVA with one of the DVs showed both a main and an interaction effect. ...
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Characterizing clusters by separate feature vector scores

Say I have a medium amount of dependent variables in a study. These are scores from questionnaires that have been standardized so all are on a scale from 0 to 1. I have clusters of my patients - ...
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Structural partition for cross validation

Can the partitioning of data for cross validation be used structurally to assess the transfer ability of an effect of one factor across another factor? A MANOVA performed on multivariate data reveals ...
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29 views

MANOVA analysis in with many dependent variables

I'm running a statistical analysis in R for an investigation on subjective time perception and its relation with Winter-over syndrome. I have 10 variables which are subject's answers to 10 different ...
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comparison of N groups of independent individuals curves: summary-variables or nonlinear mixed effect model?

I want to assess wether there is a significant difference among two groups, based on a sample of independent individual curves in each group. The logical next step is to try to understand what ...
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MANOVA: What to do with a u-shaped DV?

I am hoping to get some advice on my analysis for my MSc dissertation. I will try to keep it short but please let me know if there is more information I can provide to make the situation clearer. ...
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4 continuous DVs, 12 continuous & discrete IVs: Issues of multicollineararity & multivariate question

I am conducting an analysis to see if various attributes about a set of stimuli affect the rates of different kinds of errors subjects make. I have 4 continuous DVs (error rates) I'd like to predict ...
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64 views

Multivariate repeated measures without between subject factors (Manova vs Anova)

I'm trying to run an analysis in SPSS on some EEG data, obtained with the following design: 1 within subject factor, 6 dependent outcome variables. First, I was thinking about a repeated measures ...
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40 views

Can I report Univariate results without multivariate results in MANOVA?

I have nonsignificant results for my multivariate analysis (2-way MANOVA with 1 RM). Keep in mind there are 10 DVs that are correlated. The univariate results show significant results for 1 of the ...
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What is the difference between one-way MANOVA's and Hotelling T2 procedure?

I´m relatively new in area of statistical analysis. Can someone explain me what are the main differences between one-way MANOVA's and Hotelling T2 procedure?
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1answer
51 views

When should I use split files on a manova?

I am performing a MANOVA and when I use split files I get significant interactions. However if I don´t split the file I do not get any significant interactions. I am interested in knowing how ...
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1answer
63 views

Difference between multi-factor ANOVA and Cox proportional hazard model?

I am wondering what is the difference between multi-factor ANOVA and Cox proportional hazard model? As I understood both of them test the significance of some independent factors on a dependent ...
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3 categorical variables (2 are repeated measure variables) and 1 continuous variable - what analysis?

I originally ran a 2(inclusionary condition)x2(interaction with close other vs stranger)x2(time of pain measurement-repeated variable) mixed manova with 2 dependent variables(physical pain ...
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Correct test to test effects of time and treatment

I have a dataset consisting of 3 treatment levels (A, B and C) and a response variable (plant height). Each treatment has 10 plants. Each plant is measured twice, once at the beginning and end. I ...
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Students answer the same test twice; is MANOVA appropriate to test if the performance increased?

A teacher gives a 2-question quiz to a class of 30 students once before teaching the subject and another time at the end of the class. (The same exact 2 questions are given at the beginning and at the ...