Questions tagged [manova]

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

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Model simplification in SPSS [closed]

can someone please guide me with performing model simplification with steps in SPSS? I am assessing the attitude of people towards animal welfare and have collected data on attitudes using a Likert ...
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MANOVA invalid type (list) for variable R studio [closed]

I have dataframe contain 600 columns and 50 row and i want to perrform MANOVA i tried the following code ...
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Effect size calculation on a MANOVA with contrasts

I would like to conduct a repeated samples (patient) ANOVA (with Factor X with 3 levels A, B, C) with the planned contrasts (A+B)-C (i.e 1 1 -2) and (A+C)-B (i.e 1 -2 1) as well as calculate the ...
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What test to use to control for socio-economic status (MANOVA?)

Newbie question. I'm studying the stress levels of a minority population and I intend to compare it with the stress levels of a majority population. However, I'd like to explore whether discrimination ...
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Which statistical analysis should I use for my research proposal?

So I'm designing a study but not sure which statistical test to use. Participants will be split into three groups - A, B, and C. For all participants, I will first conduct a questionnaire and will use ...
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repeated measures design vs. MANOVA power analysis

My collaborator and I are building a study where participants will read some profiles that vary for 3 dimensions each having 3 levels (9 profiles in total). For each profile participants will have to ...
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Mixed model in R: Are ezANOVA (from the ez package) and anova_test (from the rstatix package) fundamentally wrong?

I've recently completed a study on an animal (rat) model of a psychiatric disorder. In summary, the study consists of the following steps: Induction of psychiatric disorder A Behavioral test (test 1) ...
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The minimum number of sample size for two-way MANOVA and unequal sample sizes

I have 2 categorical IVs(2 levels in each variable) and 3 continuous DVs. One IV is teaching approach and the other one is education (a moderator). I'm going to examine the effect of the 2 IVs on DVs ...
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Several one way anovas vs factorial anova

Is running several separate one-way anovas instead of factorial anova or two way anova have a big influence on p-value? If i run separate anovas will I get completely wrong results? I have 7 ...
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Would i do a mixed model MANOVA, a one factor MANOVA followed by individual MANOVAs?

Ive been trying to learn about MANOVAs and cannot seem to find examples relatable to my data, or I am not understanding the language being used to teach the concepts. I have stable isotope data which ...
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Three-way manova or separate anovas?

I have three independent catagorial variables and two dependent continuous scale variables, so I want to compare means across these three independent catagorial variables. I think here the best choice ...
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How to do a MANOVA if my three dependent variables have only two degrees of freedom?

In my experiment-design I have 3 dependent variables. They are related to percentages of time during which the subjects exhibit a certain behavior. As they always must exhibit exactly one of these ...
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One-way repeated measures MANOVA in Python

I was wondering if it is possible to do a one-way repeated measures multivariate analysis of variance in Python? Sadly, I can only find explanations for repeated measure ANOVAs online. I have 1 ...
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Manova nuisance covariates

I am running a manova e.g.: manova_result <- manova(dependent_variables ~ independent_variable + nuisance_variables) This shows a strong relationship between ...
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SPSS and Research Design/Analysis HELP

For my Major Research Project, I am investigating: Online versus Virtual Learning Environments - to determine the effect of student engagement on levels of presence when comparing these two ...
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MANOVA for different dimensions of the rubric

We have two groups of students divided into control and experimental group, with a specific teaching method being the intervention. There are about 35-40 students in each group. We are grading one of ...
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Do I conduct multiple ANOVAs or a MANOVA for a dependent variable that is not technically continuous?

I am planning a research with 1 independent variable (3 levels; young adulthood, middle adulthood, older adulthood), and 1 dependent variable (Individualism-collectivism). But my problem lies within ...
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Linear mixed model (repeated measurements) on HUGE dataset

I have a huge dataset with measurements of 21k genes across 11k samples. The measurements, called expression, represent (roughly) how "active" that gene is in the cells of the sample (in ...
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What ANOVA or any other test should I use if I have two independent variables and one dependent variable?

I have four groups - one group that will look at condition A, one at B, one at C and one is the neutral condition. The groups are comprised of different genders and age groups (ranging from 18-70). ...
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Confusion between ANOVA and MANOVA

I have a dataset with participants which have used two methods (method 1 & method 2) to measure a variable with different levels (5 levels) in minutes. My intention is to see whether there are ...
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perform pillai test on multivariate regression by hand

The build-in anova uses pillar's trace to examine the null hypothesis. To perform a pillar test, we need a hypothesis sum of squares and cross products matrix $H$ ...
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Manova, Hotelling's T^2 and follow-up?

For my final thesis, a few questions arose during the pre-registration process and I would be very happy to receive answers. I will conduct an experiment with three groups (1, 2, 3) and 3 dependent ...
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Performing comparisons (t.test) between subjects at different timepoints

I am reflecting on the analysis I was asked to perform. It is about 400 patients subjected to several nutritional interventions. We are trying to see if there are differences at baseline, 6 months ...
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Reason for insignificant multiple regression analysis & alternative statistical approaches?

I have a very broad question regarding my statistical analysis and hope some of you can enlighten me how to proceed further. Generally, I analyze the value creation in company acquisitions. I divide ...
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Non-normal data, manova and kruskal_test

I am trying to perform a statistical test on a large data frame. For this, I was thinking to find differences between groups using MANOVA. I have 70 columns and 2 independent variables. In the example ...
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Test of Significance in Discriminant Analysis for R

I am currently learning about discriminant analysis in R. As far as I know, the MASS package allows us to perform Linear Discriminant Analysis using the ...
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Moments of the Hotelling Lawley Trace under the alternative

The Hotelling Lawley trace is used in multivariate ANOVA, or for tests of the Multivariate General Linear Hypothesis (regression coefficient testing in many-to-many linear regression). For our ...
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is applying MANOVA okay with time-series profile groups?

I'm working with these type of time-series data (profiles), each profiles shows electricity usage for 48 hours for different 'buildings'. We can see some similarities between some profiles, but ...
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1 IV (3 categorical levels), 2 DV's (both scale data) - which test?

Terribly bad at stats - My grp sizes are horribly unequal and one is highly kurtotic - should I simply leave them this way or is there something I can do to 'normalise' while protecting effect size/...
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MANOVA: Dependence in dependent variables

In my study, I have two age groups (YA and OA) and 3 scores (A, B, C) are collected from each participant. Here I'm interested in two dependent variables, "RCG" which is calculated by ...
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Finding variable contribution in manova

I have a dataset with one grouping factor and some dependent continuous variables. Given the difference, I want to know which variables contribute the most to the difference, like this variable A is ...
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Repeated-Measures ANOVA or Multivariate ANOVA - and how to calculate power?

I am trying to determine the experimental design and find a proper method for statistical analysis, especially to assess power (or the sample size needed for a specified power). First, let me explain ...
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Statistical significance of distance between difference of vectors (LDA)

I have an output from Latent Dirichlet Allocation (LDA) which sums up the corpus of about 2,000 documents into 50 topics. The 2,000 documents belong to a category each (in total there are 4 categories,...
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How to perform ANOVA for data measured with unequal time interval?

So I have a set of patient data divided into 3 groups based upon their vision. I also have data on few variables that I believe to be relevent which are measured pre-surgery, 1 day post-surgery, and 7-...
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Excluding participants due to issue in randomisation?

I have been carrying a study and due to a human error in the randomisation process, instead of getting equal sized groups (I have 8 and aimed to have 100 per group), I now have around 90-100 ...
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Permanova of NDVI dataset from different years and Land Cover

I am analyzing 600 training samples which represents different Land Use/Land Cover and collected over different year. For Each training sample, there are 23 observations (NDVI time-series) in each ...
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How to detect groups in data

I have sensor data collected over several different pieces of equipment running different processes. Each time a process is run the same signals are collected resulting in ~20 time series per process....
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Am I (reviewer) correct or is the researcher correct re: Bonferroni?

I've been asked to review an article for a low-tier journal, such that I am the only reviewer with stats knowledge (such as it is; I used to teach stats and advanced stats, but it's been a few years ...
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Suitable test for data with multiple categorical dependent variables?

I have a dataset with multiple independent variables (time being one of them, so repeated measured) and multiple ordinal dependent variables that have 3 grades for each (like grade 2 for being ...
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GPower: How to analyse repeated measures (within-comparison) data where the number of participants decreases in each measurement

We conducted an experiment with two groups and three separate measurements, which were conducted 2 weeks apart. The number of participants decreased in each measurement because of the Covid pandemic (...
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Multiple post-hoc tests after Multivariate GLM/MANCOVA

I have three groups, where I am doing a multivariate GLM/MANCOVA to test for multivariate differences between groups (6 DVs), adjusting for 2 covariates. I would like to do post-hoc tests to see which ...
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2 dependent variables (cont and cat), 2 independent ones (cat): Manova?

I'm trying to interpret some results I have from a Stroop test. My hyphotesis was that emotional words would have a higher reaction time than neutral words. I have 4 variables: 2 dependent ones (...
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Comparing two participant groups on multiple likert scale response options in exploratory study

Hi I am new to CrossValidate so wanted to thank anyone in advance for contributing and looking at my questions. I am presently reviewing data from an exploratory study where two groups of participants ...
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A non parametric equivalent to MANOVA

I would like to investigate whether there are significant differences between three different groups. There are about 20 numerical attributes for these groups. For each attribute there are about a ...
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Non-parametric testing for three way interaction effects

I'm looking for the appropriate test to perform to determine if there is a three-way interaction effect on my (non-parametric) likert-scale data. My data currently has a dependent variable with values ...
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When running MANOVA and you have a significant Levene's Test prior to the univariate tests, what is the best course of action?

When running MANOVA, if Levene's test is significant, aka homogeneity of variance is violated, before the univariate output, aka the test of between-subjects effects, what is the best option after? I'...
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Multiple t-tests after MANOVA

I have data on many biomarkers from flow cytometry in a case-control design, and I need to evaluate which biomarkers differ between the two groups. I performed a MANOVA and the results were very ...
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Comparing germination times between treatments within two soil types for several species. Nested Anova?

I need to compare the germination times (days till germination) of several species which have had 3 different treatments applied to them. However, the treated seeds have also been placed into two ...
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What is the alternative to the 2-way ANOVA when the data are non-parametric in addition to being non-ordinal

I understand that the scheirer-ray-hare test would be a good option, however, the literature mentions that it is not reliable in my case because it uses data on an ordinal scale. What alternative ...
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MANOVA test statistics with GLM Multivariate Multiple Regression in R

Good afternoon! I am currently working on my master thesis and I am a bit stumped on how to proceed practically with my analysis. I am running a Multivariate Multiple analysis on a dataset, so I have ...
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