322 manova questions.

(Very basic question) MANOVA and how to assign data to it

0 answers, 4 views r manova
A bit of background before the main dish: I am attending a course, where for the first time (I know, It's kind of suprising) in my university career we were given set of data and said to conclude some ...

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 ...

Comparing Means: Multiple Dependent Variables

1 answers, 1.041 views t-test manova z-test
I am using school-level data to compare mean scores for two groups (Group A schools and Group B schools), as measured by a series of indicators: 1) grade-level exam percentile, 2) percent of male ...

Wilcoxon signed rank, MANOVA, or another method

0 answers, 19 views hypothesis-testing manova
I'm having trouble determining the right test for an experiment. You have a sample pool of individuals (patients). You take two independent measurements ...

3 Kruskal Wallis or Manova

2 answers, 446 views manova kruskal-wallis
I have to analyse 8 independent variables (IV) toward 8 dependent variables (DV) in my research. The IV is nominal while DV are ordinal (likert-scale). I run the normality test and the result is zero (...

0 answers, 10 views multivariate-analysis manova vegan
I have a between subject variable "treatment" and have a pre and a post measurement for each subject (50 per treatment = 100). The multivariate outcome are bacterial abundances. I control for 2 ...

Why are are the degrees of freedom for a phylogenetic manova n-2?

0 answers, 16 views manova degrees-of-freedom phylogeny
I have run a phylogenetic manova in R and my data consists of 82 observations and 2 in my group. The summary table that is returned shows Df for my group as 1 (which I understand) yet my Df for the ...

5 Significant output in Levene's test for equality of variances in MANOVA; what to do?

1 answers, 1.682 views spss assumptions manova levenes-test
I want to perform a MANOVA in SPSS as follows: i have a independent variable that consists of three groups (- of which the group sizes are not equal), and six dependent variables. When checking the ...

MANOVA or another analysis method?

I have an experiment where participants: see four scenarios (words and a picture) two dichotomous variables (the picture and a headline) in the scenarios are manipulated (hence the four scenarios or ...

1 Sample size estimation for MANOVA

1 answers, 455 views sample-size power manova
I am trying to run a replication of a study which used a factorial design (2x2) with three DVs (dependent variables) and subsequently ran three ANOVAs to test their hypotheses. Given that the DVs in ...

5 Multivariate differences between groups controlling for one factor (MANOVA)

I have a sample of 100 participants who have scores on 5 different variables (V1-V5). Some participants took part in a workshop, others did not. I am interested in investigating the influence of ...

4 MANOVA with unequal sample sizes

I have data for 352 response ratings that have been categorized as "Low," "Medium," and "High." I would like to compare the differences of five variables across the three categories to see which ones ...

26 Differences between MANOVA and Repeated Measures ANOVA?

3 answers, 38.192 views anova repeated-measures manova sphericity
What is the difference between a repeated measures ANOVA over some factor (say experimental condition) and a MANOVA? In particular one website I stumbled across suggested that MANOVA does not make the ...

Analysing pre and post treatment within one group plus two control groups

0 answers, 12 views anova repeated-measures ancova manova
Basically, I have a mixed design, with 3 groups (between subjects), and 13 personality traits (within subjects). However, one of the groups has pre- and post- scores. There was a fictional character ...

1 Carry out power analysis for MANCOVA using G*Power

1 answers, 993 views power-analysis manova gpower
There are helpful questions and answers for how to calculate the required sample size (or carry out a power analysis) for MANOVA, but not for MANCOVA using the freely-available G Power software. Is ...

3 How to work out Effect Size for a MANOVA using G*Power

1 answers, 10.416 views anova effect-size power-analysis manova gpower
I'm using G*Power to work out how many participants I need. I'll be using a MANOVA, I have two independent variables (Male and Female) and they will be answering 13 different questionnaires so 13 ...

2 Why Linear Discriminant analysis in MATLAB and R are producing different results

0 answers, 31 views r matlab discriminant-analysis manova
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 ...

Mixed desgin ANOVA or LMM?

1 answers, 39 views r anova mixed-model linear-model manova
I am hitting a wall and would appreciate some help. Here is my data (raw data, before computing the means): ...

Compare 3 time series for significant differences in R

0 answers, 24 views r time-series manova
I have an experiment with a control group and two intervention groups. Measuring a result to several timepoints. I want to see if result is different for different groups for a given time. Since ...

Comparative Analysis

First I would like to indicate I plan to use Bayesian analysis methods (as instructed) I want to compare the effect of 6 independent variables (IVs) on four dependent variables. The dependent ...

Investigating correlation between two dependent variables

0 answers, 115 views regression correlation stata manova
I have panel data with approx. 20,000 observations on different firms and years. In each observation, a firm makes a business decision, deciding for either $A$ and/or $B$ (both are continuous from 0 ...

Nonparametric test for MANOVA in R violation of homogeneity and unequal group sizes

0 answers, 25 views r manova
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 ...

1 What statistical test should I use for my data set?

0 answers, 24 views hypothesis-testing manova
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 ...

1 Choosing between MANCOVA and RDA to factor out treatment effects

I am working on a data set of intertidal organisms and am looking for a multivariate technique that will help me determine why some groups have different species assemblages than others. I was ...

Change in insect community over time using PERMANOVA, should i include nested effect and how to interpret my results?

I have a data set of an insect community composition (17 insect species, raw abundance data, sampled 5 times over 60 days within 24 tanks (4 replicates). There were 3 treatments (free fish, caged fish,...

2 Number of dependent variables greater than # IV's in multivariate hypothesis test

I have a multivariate regression model $\mathbf{Y}$ = $\mathbf{XB}$ + $\mathbf{E}$ where $\mathbf{Y}$ is $n \times m$. In my case $\mathbf{n < m}$, the number of columns in $\mathbf{Y}$ is ...

Appropriate design for multivariate within subjects experiment with fixed factor

I am designing an experiment to test whether an experimental manipulation for another study has the desired effect. I have 4 pictures showing either cold but competent or warm but incompetent people ...

MANOVA assumption violation

This is about my PhD thesis where I am trying to see the pattern of memory deficit among different types of hypothyroidism. I have used a between subject group design. I have 1 IV with three levels. I ...

37 How to interpret type I, type II, and type III ANOVA and MANOVA?

1 answers, 28.108 views r hypothesis-testing anova manova sums-of-squares
My primary question is how to interpret the output (coefficients, F, P) when conducting a Type I (sequential) ANOVA? My specific research problem is a bit more complex, so I will break my example ...

How many levels is to many levels in a multiple factorial ANOVA (MANOVA)?

I performed an experiment where in which I got very good results when I perform the MANOVA analysis using 3 factors with: 3x3x9 levels. Then I tried to get a global perspective of the interactions ...

1 Two-way MANOVA - No significant multivariate interaction - can I still interpret univariate interaction?

0 answers, 80 views anova mixed-model interaction manova
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. ...

2 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 ...

Running MANOVA with Likert Scale Negative Skew

1 answers, 23 views covariance-matrix likert skewness manova
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 ...

Still using GLM with violation of normality? Bootstrapping?

0 answers, 50 views generalized-linear-model manova
For my statistics course, it is asked that we come up with the best (and most original) analyses to answer the following research question: Does group influence recidivism? The variables include ...

MANOVA Power Analysis 2x3

0 answers, 37 views repeated-measures manova
I am doing an experiment that is comparing bilingual to monolingual performance across 3 variables. Each variable will be measured randomly 40 times in succession in a computer program (120 trials). ...

2 Run ANOVA before MANOVA?

0 answers, 43 views anova generalized-linear-model 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 ...

How to interpret the SPSS output for MANOVA?3

0 answers, 21 views multivariate-analysis manova
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 ...

1 Need help with my MANOVA

0 answers, 85 views r assumptions 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 ...

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 ...

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 ...

MANOVA/Regression analysis

0 answers, 14 views multiple-regression manova
I have a group of people who have undergone one of two procedures. The effect of this has been measured at yearly time points. Am i correct in using the MANOVA test to assess the differences between ...

2 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 ...

1 Can I use MANOVA on non-normal data?

0 answers, 47 views feature-selection nonparametric manova
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 ...

Model matrix, contrast matrix, transferring tutorial to real data

0 answers, 23 views r matrix manova contrasts vegan
I have been following this tutorial to perform simple main effects on a multivariate data set that shows a significant interaction between two factors. I can't find any other tutorial that does this ...

3 How to read the output from MANOVA?

1 answers, 5.739 views r interpretation manova
I'm testing if/how the two factors C and V affect the dependent variables fric and ...

1 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) ...

Is there a test under MANOVA paradigm that doesn’t require estimates of covariances between dependent variables?

I have 2 x 4 ANOVA design with multiple dependent variables (there are several hundreds of DVs). The first factor is gender the second is nationality. I want to test hypotheses that there are ...

Is it possible to avoid a singularity in a four-way interaction in a Manova (from car package)?

0 answers, 31 views r anova manova car
I am trying to run a Manova (from the car package) on this model like so: ...

1 Python ANOVA or MANOVA

0 answers, 222 views correlation anova python manova pandas
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 ...

2 Alternative to a MANOVA

1 answers, 41 views r 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 ...