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Questions tagged [manova]

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

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MANOVA - Can I use DV's with different scales?

Maybe it is a dumb question, but I'm not finding any reference that specifically answer to this question. Is it possible to use two DV with different scales in a MANOVA or do I need to standardize? If ...
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Why does One Way ANOVA not have an SSE Term?

For a Two Way ANOVA with two factors A and B, the Sum of Square equation is:- SSTO = SSA + SSB + SSAB + SSE Where, SSTO = Total Sum of Squares SSA = Sum of Squares due to Factor A SSB = Sum of ...
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how/what post-hoc when covariate is significant in MANOVA?

I am running MANOVA with group (patient vs hc) and covariates (age (interval), gender (categorical), handedness (categorical)) on a number (3-8) variables (metabolites; interval). groupmembership ...
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MANOVA with variables from different datasets

I conducted several experiments where I have one underlying independent variable (tree species, IV). Each of these experiments gave me one dependent variable (DV), like bark pH, rugosity or the water-...
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Find significantly differences between multi-variant groups

I have 11 groups, each consist of about 200 observations, and each observation has 2 variables (which are actually the first two PLS components if it makes any difference). Each group is a substance ...
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What is the correct number of measurements and groups in the following Design?

I using GPOWER: "Anova repeated measures within factors" and need help in giving a correct number to the following inputs: Number of groups. Number of measurements. The design is as follows: I have ...
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Correct group of factorial and repeated-measure ANOVA

I'm currently having trouble defining what type of ANOVA I need to run as well as how to run it correctly. This is the following setup: I have 4 groups of 30 people doing a 2-session task (one after ...
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Repeated Measures Permanova with adonis

I have a between subject variable "treatment" and have a pre and a post measurement for each subject (50 per treatment = 100). The multivariate outcome are bacterial abundances. I control for 2 ...
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Why are are the degrees of freedom for a phylogenetic manova n-2?

I have run a phylogenetic manova in R and my data consists of 82 observations and 2 in my group. The summary table that is returned shows Df for my group as 1 (which I understand) yet my Df for the ...
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Wilcoxon signed rank, MANOVA, or another method

I'm having trouble determining the right test for an experiment. You have a sample pool of individuals (patients). You take two independent measurements ...
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Analysing pre and post treatment within one group plus two control groups

Basically, I have a mixed design, with 3 groups (between subjects), and 13 personality traits (within subjects). However, one of the groups has pre- and post- scores. There was a fictional character ...
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Why Linear Discriminant analysis in MATLAB and R are producing different results

I am applying manova and lda to my data 12 samples (6 groups with 2 samples in each) and 6 measurements. I used lda form MAS5 package in R and different LDA functions in MATLAB. They all gave me ...
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Mixed desgin ANOVA or LMM?

I am hitting a wall and would appreciate some help. Here is my data (raw data, before computing the means): ...
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29 views

Compare 3 time series for significant differences in R

I have an experiment with a control group and two intervention groups. Measuring a result to several timepoints. I want to see if result is different for different groups for a given time. Since ...
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Comparative Analysis

First I would like to indicate I plan to use Bayesian analysis methods (as instructed) I want to compare the effect of 6 independent variables (IVs) on four dependent variables. The dependent ...
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Nonparametric test for MANOVA in R violation of homogeneity and unequal group sizes

I have data on which I wanted to perform a MANOVA. However, homogeneity of variance has been violated and the groups sizes are varying a lot (see below). I know about Welch's test and the Kruskall ...
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What statistical test should I use for my data set?

I have a data set on 20 patients. These patients were administered a cognitive test over the duration of their stay in an inpatient clinic. The cognitive test measured 5 different outcomes (like ...
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Two-way MANOVA - No significant multivariate interaction - can I still interpret univariate interaction?

Assume that a two-way mixed (two independent variables (IVs)) MANOVA was conducted. The multivariate interaction effect of the two IVs on the dependent variables (DPs) together was not significant. ...
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How many levels is to many levels in a multiple factorial ANOVA (MANOVA)?

I performed an experiment where in which I got very good results when I perform the MANOVA analysis using 3 factors with: 3x3x9 levels. Then I tried to get a global perspective of the interactions ...
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Running MANOVA with Likert Scale Negative Skew

I am running a MANOVA in SPSS and I am finding that my Box’s test of equality of covariance matrices is significant. My sample size is 130 and I’m comparing 2 groups—one with 70 participants and one ...
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Still using GLM with violation of normality? Bootstrapping?

For my statistics course, it is asked that we come up with the best (and most original) analyses to answer the following research question: Does group influence recidivism? The variables include ...
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Multivariate analysis for repeated measures with dependent treatment groups and independent control groups

I conducted experiments to test the effect of a treatment on multiple response variables. Measurements were taken over consecutive rounds (i.e., time steps) of an experiment, with each round ...
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23 views

How to interpret the SPSS output for MANOVA?3

I have a question about my MANOVA output. In the 'Multivariate Tests' table i found a significant main effect of Trust [ F (66.00, 72.00) = 1.62, p < .05 ]. Also, two significant interaction effect ...
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Run ANOVA before MANOVA?

In a mixed design I have two independent variables (IVs) and one dependent variable (DV). The DV can also be interpreted with its sub-dimensions. Thus, the formerly (one) DV can be spitted up into ...
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Need help with my MANOVA

First a short description of my dataset: I have 8 independent binary variables with the values 0 and 1 (say something about characteristics of the subject line of an e-mail) I have 7 dependent ...
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Which statistical test should be used?

I am stuck in deciding which statistical test would be more appropriate in my case. My research questions are whether or not in the gait analysis there are differences in pressure between ten foot ...
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Significant differences between dichotomous multiple response variables

Kind people, I want to measure if there is any difference in the use of newsframes in 198 news articles between the 9 countries who own nucleair weapons. I have created these frames with a factor ...
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MANOVA Power Analysis 2x3

I am doing an experiment that is comparing bilingual to monolingual performance across 3 variables. Each variable will be measured randomly 40 times in succession in a computer program (120 trials). ...
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MANOVA/Regression analysis

I have a group of people who have undergone one of two procedures. The effect of this has been measured at yearly time points. Am i correct in using the MANOVA test to assess the differences between ...
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113 views

Can I use parametric and non-parametric tests in the same publication?

I have a rather difficult dataset. One measurement is non-normal and zero-inflated and could not be transformed to normality. Thus, a glm was used. Another set of ...
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Can I use MANOVA on non-normal data?

I have a dataset with 1652 samples collected from 6 sites, classified in three types: forest, stubble and pasture. I have extracted 26 metrics from them. I would like to identify the variables that ...
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Model matrix, contrast matrix, transferring tutorial to real data

I have been following this tutorial to perform simple main effects on a multivariate data set that shows a significant interaction between two factors. I can't find any other tutorial that does this ...
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ANOVA or multiple regression? longitudinal study

I'm doing a longitudinal study of healthy patients (so I'm studying them over time ... say at age 7,8,9,10,11,12) I think my independent variables would be: Age (continuous) and sex (2 categories) ...
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Is there a test under MANOVA paradigm that doesn’t require estimates of covariances between dependent variables?

I have 2 x 4 ANOVA design with multiple dependent variables (there are several hundreds of DVs). The first factor is gender the second is nationality. I want to test hypotheses that there are ...
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Is it possible to avoid a singularity in a four-way interaction in a Manova (from car package)?

I am trying to run a Manova (from the car package) on this model like so: ...
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292 views

Python ANOVA or MANOVA

I have a datasets with samples from various locations. At each of these locations I measured the concentrations of various genes. I saved the results in pandas dataframe and would like to compare the ...
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39 views

What statistical test do I use for 2 IV's and 3DV's?

I'm trying to find out whether personality (tetrad) effects sexual fantasy, sexual behaviour and sexual attitudes. In addition I want to find out whether gender has an effect on all of this. What ...
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Appropriate design for multivariate within subjects experiment with fixed factor

I am designing an experiment to test whether an experimental manipulation for another study has the desired effect. I have 4 pictures showing either cold but competent or warm but incompetent people ...
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what test should i run for a 2x3x2 mixed design with control/baseline that applies to both IV's

my study had 6 music conditions plus a baseline/control trail with no music to look at the effects of pitch (2 levels) and complexity (3 levels) on the 2 DV's. it was a repeated measures design but im ...
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Should I run a split-plot ANOVA or a MANOVA?

I am running an analysis of two different groups (control vs experimental group) and their performance on one test that occurred 3 different time periods ( pre-intervention, mid-intervention and post-...
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MANOVA on one-group pre-post design with multiple DVs [duplicate]

Is MANOVA an appropriate omnibus test for a one-group pre-post intervention with multiple DVs?
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What statistical test should I use? Mixed ANOVA?

I am testing the effectiveness of an intervention. I have 3 groups of participants (age 5, 10, 15), who will be randomly assigned to either intervention group or control group. I will conduct the ...
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MANOVA vs ordinal logistic regression

I have a response variable with five ordered classes and several, possibly interacting, continuous independent variables (meteorological observations). My understanding is that an ordinal logistic ...
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79 views

MANCOVA or Multivariate Regression (Please help!)

I am working on an assignment and would like to use the following variables. Dependent variable 1: Internalizing problems (continuous) Dependent variable 2: Externalising problems (continuous) Both ...
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Is MANOVA appropriate for a one-group pre-post design?

I have a simple one-group pre-post design with a series of 5 dependent variables that are related to mental health. Is it appropriate to perform an initial doubly MANOVA test of the whole dataset as ...
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113 views

adonis - data normalisation?

I'm using adonis, an implementation of MANOVA in R (vegan package) to understand how continuous (temperature, pH) and ...
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1 IV with two categories and 5 DV, which statistical test to choose? [duplicate]

I'm wondering which statistical test to chose to find out which of my five DV is the difference between Country X and Country Y not statistically significant? My Variables are: 1 Independent ...
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89 views

Should MANCOVA be applied on entire data or just on training set after feature selection?

I have a dataset with total samples 100 and total features 150. Features are the counts of expressed genes. I also have age and gender of the samples. I divided the samples in training, cv and test ...
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606 views

What statistical test for cluster analysis results should I use?

I have a set of 35 independent variables (features). I do not have response variable for my data set. I used density plots to identify multi-modal distribution in my independent variables. Hence, I ...
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MANOVA and correlations between dependent variables: how strong is too strong? more than 2 variables

I was reading MANOVA and correlations between dependent variables: how strong is too strong?. The question is about MANOVA with two dependent variables. I have a question about 3 variables Y1,Y2,Y3 ...