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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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What stat analises to use? In SPSS

What analises to use? MANOVA? And how? I have a following design: Two groups made the same task and the result I have in Reaction times ( dependent variable). I have three additional variables (...
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In VEGAN ADONIS, what does "method='bray' do when I pass in a distance matrix I already have (UNIFRAC)?

Suppose I have a distance matrix created by applying the weighted unifrac measure. For instance, using a phyloseq object: ...
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What analysis should I use?

I have a dataset with 5 years of data, and am looking at trends in outcomes over time - so I have a categorical independent variable of Year, and 7 dependent variables, 5 of which are boolean, 2 of ...
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Are my PCA groups significantly different?

I am studying the feeding behaviour of deep sea fishes, and have produced a dataset containing percentages for 20 different fatty acids (totalling 100%) for 32 individual fish. I have performed PCA (...
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What statistical method should I use to quantify a tests ability to separate by category?

Say I have the table of results below. In Test 1 categories a, b, and c produce results which are clearly distinct. In Test 2 the categories produce some separation, though not entirely. Test 3 ...
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Do I need to correct for p-value when doing repeated ANOVA test?

We are investigating the relationship between smoking status and the hormone level. Smoking status is X(three-level) and the level of the hormones is Y(continuous variable). However, the smoking ...
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Why does adding a dependent variable to a MANOVA remove significance?

We designed an experiment with 2 discrete independent variables (IV), 1 (measured) confounding variable, and 2 dependent variables (DV). We hypothesize that the two IVs interact on both DVs. Right ...
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Does ordinal logistic regression substitute for “multifactorial Friedman test”?

I'm searching for an appropriate statistical test, more or less a multifactorial version of Friedman test. But I'm also wondering if Wilcoxons rank sum test can do the job. Expt design: 10 larvae ...
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Is a mixed effects logistic regression appropriate here?

I have recently conducted an experiment to investigate if a certain Design Type and Question type would influence the performance of participants within a calculation task measured by success (yes/no) ...
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A is correlated with B/ A has an impact on B

I've been reading papers to collect materials for my bachelor thesis, and I came across this question and wasn't sure if my understanding of the concept is correct. Is "A is correlated with B" the ...
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Is there a maximum amount of dependent variables for MANOVA?

I have a dataset where the influence of 3 manipulations (vs placebo) is tested on 17 different outcome measurements. To avoid having to run 3*17 = 51 ANOVAs to see which type of manipulation has an ...
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How to perform MANOVA with categorical independent variables

I have a dataset where the independent variable is sieve size (categorically either 25, 63, 100 or 150), and the dependent variables are length and width. ...
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Question on interpretation of covariates in repeated measures analysis [closed]

I am currently having difficulties with the statistical analysis of my research. My research is the effect of a drug on 3 measures, upper limb impairment and 2 qualtiy of life measures at two time ...
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UPDATED: Multiple lme models or MANOVA with random effects? Problem with singular fit

hope you can help me with this issue! In my study I have 4 outcome variables which correspond to the ratings I collected for 4 different psychological dimensions (liking, comfort, approach, ...
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Will Three Manovas be appropriate?

I’m running a correlations analysis. Hypothesis is that group 1 will score higher in subscale measures of socioemotional dimensions. Dependent variables- three different learning style groups(smallest ...
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Repeated measures does not give result

For my thesis, I have to perform a repeated measures analysis. I already found videos and articles about how to perform this and it works with the data that they use in these videos. However, if I ...
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Why analysis of variance should I use for my clinical trial proposal?

I have 2 independent variabiles(2 treatment groups) and 2 outcomes, measured at 3 time points. Is manova the analysis I should use?
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The orthogonal rotated data

Suppose the multivariate one-way anova model for the raw data , i.e. $$ \label{Example_model_1} \mathbf{y}_{ij}=\mathbf{\mu}+\mathbf{z}_i+\mathbf{e}_{ij}, ~~ i=1,\ldots,m,~~j=1,\ldots,n_i,~~~~~~~~~~...
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An Interesting Model with Unknown Orthogonal Design Matrix

Consider a linear mixed model, $$\mathbf{y}_{ij}=\mathbf{\Gamma}\mathbf{\mu}+\mathbf{z}_i+\mathbf{e}_{ij}, ~~ ~~i=1,\ldots,m,~~j=1,\ldots,n_i, $$ where $\mathbf{y}_{ij}$ are $k\times 1$ observation ...
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Manova different output each time

I ran a MANOVA on a random subsample of a dataset when the subsample meets most of the assumptions. I tried running it again on a different subsample, and again... Each time I have different results: ...
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Do ANOVA & MANOVA require balanced levels?

I have one independent variable with two levels, or categories, and four dependent variables. When doing a MANOVA or ANOVA test, how important is it for the number of observations in each category to ...
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Comparing language loss among two types of bilinguals

I have two groups: Simultaneous and Sequential Bilinguals I have three measures: grammatical complexity, lexical complexity, and grammatical accuracy (all are quantified differently) I will conduct ...
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Violation of univariate normality of residuals for DV in MANOVA. Can i trust non-significant results?

My design is one IV (control vs patient) measured on 3 different composite structures, consisting of 8, 3 and 2 DV from a behavioral test. The measures are t-scores based on norm groups for the test. ...
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2 way ANOVA one repeated measures factor and percentages

We're investigating the effect of two different types of feedback on motor learning. We have two groups that performed 4 different tests and we'd like to see whether an interaction between these ...
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PCA plot does not show a statistical difference even though the single factor MANOVA was used

My single factor MANOVA showed that there is a statistical difference between the red and black (which represent the effect of treatment given) : the P value was <0.05. But in PCA there seems to ...
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How should I arrange my data and which appropriate test can I use?

I have conducted an experiment to determine if my treatment affects performance of athletes. Each participant will undergo the control and experimental trial. I measured a few variables: 1) Total ...
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Different main effect in MANOVA and two-way MANOVA? Which one do I use?

I did a MANOVA in SPSS and there is a significant main effect of the IV on only one of my two DVs. Then I did a two way ANOVA to include one more IV, but otherwise use the same variables I've used in ...
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Should I use a MANOVA and then a two-way MANOVA or just the two-way MANOVA?

My research questions: Is there an effect of the independent variable on the two dependent variables? Is this effect of the independent variable on the two dependent variables stronger for females ...
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273 views

two-way MANCOVA

I am currently trying to run a two way MANCOVA as I have to independent variables with 2 levels each 1) sleep chronotype (late and early) and weekly sleep loss (high and low). I have four dependent ...
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What type of test do I use in G Power?

I've got 1 IV with 2 levels (within-subjects) and 4 VD's (with 7 levels). What type of test do I use in this case ? Thank you
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Appropriate statistics for multivariate genetic analysis

I have a question on the most appropriate statistics for our genetic project. We have a dataset consisting of genotypes at several loci (10 SNPs) and phenotypes (the same person can be a control for ...
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Multiple comparisons, should I run a one-way multivariate analysis or can I use Mann Whitney?

I am analysing some study data and am unsure the appropriate statistical test to use. The study involves watching a film. 50% of participants saw version 1, 50% saw version 2 - (the difference in ...
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odd insignificant results using pairwise.perm.manova

I am trying to complete pairwise comparisons of 9 forest communities. Communities were significant at p < 0.001 using adonis. However, when I use the same bray curtis matrix with the pairwise.perm....
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Can I do multiple ANOVAs without correcting for multiple comparisons?

In my study I have one repeated measures factor that I manipulated on two levels and one between-subjects factor that I manipulated on 3 levels (three groups), resulting in a 2x3 design. I also have ...
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Help with normalising data that has A LOT of 0s [duplicate]

I recently am analysing my results (behavioural, observation-based data), and I realised that my data are non-normal. No problem, this happens in behavioural data a lot, and I thought I just needed to ...
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Checking equality of covariance matrices using Box's M test in multifactor MANOVA

With only one factor (independent variable) in multivariate analysis of variance (MANOVA), Box's M test can be used to check the equality of covariance matrices. ...
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Unequal sample sizes for npmv

I have a similar question as this: Nonparametric test for MANOVA in R violation of homogeneity and unequal group sizes which is unanswered. I have a dataset for which I want to perform a MANOVA. ...
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Is there a MANOVA test on circular variables?

I have a population 4 individuals moving in different directions in 9 different compartments. The movement is not coherent between the different compartments, but I suspect that it is coherent between ...
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Which statistical test for an experiment with 3 IV's and 2 DV's?

I am trying to figure out which statistical test to use in order to test the effect of manipulating 3 independent variables (each with 2 levels) on 2 dependent variables (both continuous). If anyone ...
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unbalanced 3 factor ANOVA in R

We are working on an fMRI study. We have the following factors to consider: -Stimulus (4 levels) -Brain structures (42 levels) -Group (3 levels) Each participant belongs to one group and received the ...
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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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How to interpret MANOVA results after adding gender, splitting the file?

I am analyzing my 2x3 between subject design with MANOVA in SPSS at the moment. In the main model, there is 2 IV's and 2 DV's. Result of the test is 1 main effect and no interaction effect. In an ...
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1answer
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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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146 views

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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24 views

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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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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104 views

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): ...