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 output table interpretation

I am running a repeated measures manova on the effect of country (2 levels) on color-emotion interpretation ( I have 5 different colors, and 3 different emotions). I have never run a Manova before and ...
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Determine DVs (dependent variable), IVs, and test objectives

I'm doing a practice problem which goes something like this. It is homework-style but not exactly. I'm doing some practice problems myself. Envato is a loyalty solutions which rewards their customer ...
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Find parameters for better group discrimunation

I have 2 types of the experiments. Each experiment gives me 3 numbers for each subject. My subjects come from 3 different groups. The fake data may be simulated using the code below (MatLab): ...
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The way PERMANOVA handling continuous explanatory variable

I have read some tutorials which explain the mechanism behind PERMANOVA, e.g., enter link description here. Based on the tutorials, my understanding is PERMANOVA can only handle categorical ...
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Statistical analysis of amino acid profiles, quantitative vs qualitative methods?

I work on a study comparing the amino acid profile of 5 sample groups with 3 replicates in each group. This is how the data looks like except that there are 17 columns (one for each amino acid) in ...
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Is it okay to perform PerMANOVA on PCA values?

Is it acceptable to first perform principal components analysis on a dataset, and then use permutational MANOVA on those principal components values, rather than on the original values in the dataset? ...
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MANOVA contrast results p-value in SPSS - Bonferroni correction required?

I am running a MANOVA with 2 IVs(2*3) and 4 DVs. I want to test the effect of the 3-level IV using a Helmert contrast: to compare if level 1 significantly differs from the mean of levels 2 and 3, as ...
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Deciding to use an ANOVA model with interactions or testing significance without interaction

I know this is a widely discussed topic and there are numerous sources and examples. However, most of the statistical jargon goes over my head. I was hoping that someone could simply explain my ...
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How to perform Repeated Measures MANOVA, with unbalanced design [closed]

I am analysing data from a vaccination study and I think that the best way to model my data is with a repeated measures multivariate ANOVA. Because I have different #'s of subjects in each study ...
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Whither multivariate regression?

I've been handed someone else's data (again). It's measurements of six proteins' levels from 20 human brain samples, 5 each of different stages of a disorder. I'd like to run a multivariate regression,...
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Mixed Model using lme4 in R for multiple response data

I am novice to R (from MATLAB) and have some questions about how to translate my data structure and research Qs to syntax for the lmer function. I am looking to predict teenagers scores on a mental ...
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Is there a way to see if there is a statistically significant mean change between two treatment groups in a repeated measures MANCOVA?

I have conducted a study with one between-subjects factor (control, low experiment, high experiment), a within-subjects factor (Time 1, Time 2), a covariate, and three DVs. Participants completed the ...
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Insignificant two-way MANOVA results - what do I do next?

I am very very new to stats. I decided to try and do a MANOVA in SPSS, my between-subjects IV is gender and my within-subjects IV is the two conditions in which all participants took part. My DV is ...
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Interpretation of between subject factors from a Mixed Models Anova with non-significant within factor effect

I just received results from a 91(Electrode-Combinations) x 2(Groups) x 2(Condition) mixed model ANOVA design, where Condition is the the within-subject factor or more precisely the repeated measures ...
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One-way MANOVA not significant, Univariate results are significant

In a one-way MANOVA investigating differences between Men and Women on 3 types of perfection, my multivariate test is not significant [F(3, 242) = 1.843, p = .140, Wilks’ Λ = .978], but results ...
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How to quantify measurement error

I would like to determine the measurement inaccuracy one of our laboratory machines in different conditions: Let's say for simplicity's sake it is a b/w digital camera with 1024x768 pixels (786,432px)...
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Is there a non-parametric alternative to Two-Way Repeated Measures Anova?

I am currently comparing the EEG funcional connectivity measured at 14 electrodes and 4 frequency bands between highly and lowly hypnotic susceptible individuals. I extracted the coherence and the ...
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MANCOVA post-hoc tests for the independent variable

I am running a MANCOVA to test whether the group means for seven dependent variables are equal across three groups, controlling for two covariates. Being the test significant, I can conclude that the ...
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Stratify the analysis if Levene's test fails

I have a question about the correctness of a statistical analysis. I have a variable called L, which is the log of the number of bacteria present in some foods. L is a function of the treatment T (...
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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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25 views

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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471 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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