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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 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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13 views

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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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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20 views

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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32 views

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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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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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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66 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): ...
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64 views

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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250 views

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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64 views

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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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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28 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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183 views

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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24 views

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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1answer
32 views

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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160 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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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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388 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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1answer
67 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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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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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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2answers
777 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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1answer
59 views

Alternative to a MANOVA

I have a dataset that contains 3 variables: A categorical variable in form of names (categories) Two numerical variables with a metric scale level (stars and review_count) My goal is to find out ...
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2answers
84 views

How to compare gender proportions in a population?

I want to test if more women are graduating from high school than men, the last ten years. I want to use percentages, not raw data. (2007-2017 percentages of women who graduated from high schools ...
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Is there a specific test for correlation between 2 measurable variables between nominal data?

I am having a hard time finding a comparable test for my data set. Here is what I have: weight of individuals and Concentration of a trace metal in each individual for 8 field sites. I want to see if ...