Questions tagged [manova]

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

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9 views

Assess multivariate distance among groups?

I'm trying to find out how to approach the problem of comparing groups in a multivariate setting. I have a dataset of 2,5m rows, that contains exports from a certain country to several others in a ...
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How to do randomization check?

I am struggling to find the most effective way to check randomization within my experiment. I have a single factor design with two moderators and two DVs. My IV is type of persuasion (0 direct ...
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How to use Gpower to calculate sample size for MANOVA?

I try to use the software2 to calculate the needed sample size for a 2 way MANOVA. The experiment is a mixed design, one Independent variable(IV) is between the subject with 3 levels, and the other is ...
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No significance in the multivariate tests

Hope this question is not too stupid. I haven't taken the MANOVA course yet, but I need to figure out a problem right now. I am running a mix-model MANCOVA on SPSS. I have no significance in the ...
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Can you use dichotomous variables in MANOVA?

I have an experimental design with one IV with 5 levels, and a combination of self-report and behavioural outcomes as DVs. The self-report outcomes are all on continuous scales, but many of the ...
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Some kind of a Manova with repeated measures

I have a question that is somewhere between R and stats I guess... Let's set up the situation: I have a test that gives 4 scores, corresponding to 4 different dimensions of a problem. We can assume ...
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Covariate on a MANOVA mixed-effects model

I have a 2(condition) x 3(group) mixed-design study. I’m interested in the effect of a continuous time-constant covariate (i.e., a unique value for each subject, similar to age) on the interaction (...
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Would a repeated measures MANOVA be appropriate for a 9DV, 2IV within subjects study design?

I am trying to get an estimate of participants to strive for in my study. Being rather new to the research and stats scene, I was hoping the community could help me out a little bit? The study has 9 ...
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Using and interpreting nested manova in R

I have measured the concentration of 7 elements in 30 Lakes. I have between 8 and 12 observations per Lake (i.e., I measured the ...
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In a One-Way MANOVA, can one of the levels of the IV have a mean of 0 with a standard deviation of 0 on one of the dependent variables?

I realize that this sounds like a very stupid question, but I need to make sure—please stick with me. The project in question is a quantitative content analysis; for the sake of this example, let's ...
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MANOVA statistics and Hotelling T2 for 2 groups

The Wikipedia article for MANOVA (https://en.wikipedia.org/wiki/Multivariate_analysis_of_variance) remarks, regarding the four most common MANOVA statistics (Wilks' lambda, Pillai trace, Lawley-...
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between subject, within subject with a covariate

I hope some of you experts can help me figure out if I am doing the right analysis for my study. Basically I have a mixed- design study. This is composed of a between-subject IV (2 groups: treatment ...
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conceptual model and mixed anova

I am doing a research about the influence of a food label on Perceived Healthfulness of a product. My independent variable is Label (absent/present) and my dependent variabel is Perceived ...
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Box's M Significant and One variable in Leven's test failed for quality of variance SPSS

I am doing a MANOVA test as part of a psycology project and have to use MANOVA Box's M gives a sign value of less than 0.05 (stated to be used on imb's website) but greater than 0.001 (stated to be ...
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What's the best function to test multivariate normality when sample size more than 3000?

Before MANOVA, I need to test multivariate normality. Then I tried MVN::mvn() function in R, output as below: ...
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Repeated Measures ANOVA or MANOVA

I am studying the effects on an intervention on one group of individuals two times, before and after intervention. I am measuring social skills using a rating scale. The rating scale has an overall ...
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Wilks.test usage in R

I want to calculate the Wilks' lambda for a given data set. The "rrcov" library in R appears to have a function for this purpose. The examples provided in the documentation run without a problem; ...
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As to unbalanced design sample data,do we need to check variance homogeneity as precondition of two way anova?

For the balanced design data,I know variance homogeneity among each cell is the requirement of two way anova. As to unbalanced design data,do we need to check the variance homogeneity of each cell? If ...
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28 views

Can we use `two way anova` when factors have interaction?

You should have independence of observations, which means that there is no relationship between the observations in each group or between the groups themselves. Above sentence come from https://...
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Comparing the before and after scores between two groups

In this experiment I'm trying to make, one group of people watches a lecture series and one does not. Before the lecture series, both groups' levels of optimism, knowledge, and anxiety are assessed. ...
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Test differences among classes (factor levels) on multivariate response, when there are ~800 factor levels

I am performing an unsupervised classification based on several environmental variables (dataset X). I want to test whether the resulting classes (~ 800) present differences in soil properties (...
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35 views

Set of Social Values of different Samples: ANOVA?

I have been collecting data for 10 consecutive years. One survey each year, different subjects (samples between 105 and 120), Likert scale 1-5 for each of 30 social values. What is the most ...
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2 groups, 4 repeated measures, dependent variable has 4 categories that add up to 100. What test should I use?

We conducted an experiment in which we had two independent groups of people that received different interventions. We tested each group before the intervention (pre-test), after the intervention (post-...
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How does SPSS calculate composite variable for MANOVA/Multivariate multiple regression?

I have analysed my data using multivariate multiple regression (8 IVs, 3 DVs), and significant composite results have been found. Before reporting my findings, I want to discuss in my results chapter ...
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How can I analyse several ordinal dependent variables across multiple time points?

So, I have several ordinal scales that have been administered to the same sample at three different time points and each is being treated as separate dependent variable. I can't run a repeated ...
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Two way or One way repeated measures Anova

I want to examine the effect of gender on running conditions. There are 4 running conditions including baseline and i want to see if there is a significant difference between genders across these ...
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One way MANOVA or Two way MANOVA

I have done statistics many times at Uni at both Undergraduate and Postgraduate levels but as they say “if you don’t use it, you lose it” and that is certainly the case. I am trying to assist my ...
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Estimating a single drug effect in a sample of patients: each patient assumes multiple drugs. Is this possible?

So here is my scenario: Patient A takes drugs 1 - 2 - 3 Patient B takes drugs 2 - 3 - 4 Patient C takes drugs 1 - 2- 4 and so on ... Each patient gets his symptom severity measured two times: first ...
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Is it possible to incorporate a dummy DV in MANOVA?

I have six dependent variables in an 2x2 between subjects experimental study. I would like to analyze the results using a MANOVA, in order to control for the type 1 error. However, one of my DVs is a ...
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Can a MANOVA be run with dependent variables of different units?

I want to determine if there is a statistically significant difference in the vector of means between two independent groups. Specifically, my between subjects factor is sex (i.e., male, female) and I ...
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RM Manova follow up - Unvariate or discriminant analysis?

I have a one-way repeated measures manova with participants measured on 2 DV's (both aspects of language quality) and one within subjects IV (condition). Participants were all tested over 4 conditions....
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Repeated Measures MANOVA Planned Comparisons & Profile Analysis

I'm conducting a repeated measures MANOVA with one IV (4 conditions) and 2 DV's. My participants have taken each condition. Assuming the MANOVA and univariate tests are significant, I would like to ...
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What statistical test (using R) can reveal relationships between 5 factors in randomized block design?

I'm at a loss as to how I can efficiently obtain p-values in R for the relationships I am interested in exploring in my dataset. Here is a picture summarizing the block design. Various response ...
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MANOVA, linear regression or Chi-square?

We have a dataset we're trying to figure out what the best way to analyze is. The datset looks like this: Group (A/B) Sex (M/F) Race (x) Response (strong, weak, none) Any thoughts? looking at it, ...
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What is Pillai's trace actually telling me?

I've read the site, the MANOVA section in a stats for n00bs book and Googled but I can't find this answer. I believe I'm conducting a one-way MANOVA. I have one IV which consists of two groups. I ...
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MANOVA or repeated measures anova or ANCOVA?

for my thesis I want to compare 3 training groups (2 different types of training and 1 control group) to see the influence on mindfulness-skills and exhaustion level (so 1 IV and 2 DV). All the ...
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Not sure which stats to use in SPSS!

I have a set of data collected on soap usage measured in mm depending on 2 options of signs in bathrooms. The data is not normally distributed and I want to test to see if the differences are ...
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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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1answer
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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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271 views

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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2answers
81 views

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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