Questions tagged [manova]
Multivariate ANalysis Of VAriance (MANOVA) is a generalization of ANOVA for the case with several dependent variables.
432 questions
0
votes
0
answers
24
views
Multiple hypothesis testing adjustment when only the number of significant tests is important
We are measuring the effect of a treatment T on a latent outcome variable (specifically, "Discrimination"). We have a number of outcome variables that we think do a reasonable job as proxies ...
3
votes
1
answer
38
views
What are the advantages and disadvantages of using a one-way between subjects MANOVA versus a split-plot repeated measures ANOVA?
For example, I would like to analyse the difference in heart rate, breathing rate, height, weight, and number of hair between three species (cats, dogs, and rats). This is a nonsensical example of ...
- 331
5
votes
1
answer
49
views
Is Repeated Measure MANOVA appropriate here?
I have data on the yearly number of doctor visits for patients from 2020 to 2022, along with characteristics associated with these visits. During each visit, patients are asked questions about their ...
- 203
0
votes
0
answers
8
views
Determining Which Variables Drive Group Differences After a Permutational Multivariate Analysis of Variance With a Post-Hoc Means Separation Test
I have a data frame with several different columns of variables (there are categorical predictor variables and several different numeric response variables). I've done a permutational multivariate ...
- 297
0
votes
0
answers
17
views
Pseudo-regression as a way of checking MANOVA-assumptions
I stumbled across an online tutorial (a YT-series for supposedly a graduate course in statistics) for implementing a MANOVA-test in R. Before carrying out the test, important assumptions are being ...
- 51
2
votes
0
answers
22
views
MANOVA - Univariate Wilks' Lambda Test (R interpretation)
I am running a MANOVA model with 2 dependents and 2 continuous predictors. (fyi - STATA calls this MANCOVA and requires dropping a "c." in front of each predictor to denote that each is ...
- 870
1
vote
1
answer
67
views
What analysis do I need for 2 Ivs and 2 DVs?
I think I need a MANOVA, but I may need an ANCOVA and then also do an ANOVA within just the experimental group.
I think it's a 2x2 factorial independent measures ANOVA within the intervention group. I ...
2
votes
1
answer
156
views
What analysis is best with a binary independent variable that is very skewed?
I have a binary independent variable (1 = event occurs, 0 = no event occurs) and a continuous moderating variable. My dependent variables are continuous. I want to test if engaging in a particular ...
- 23
0
votes
1
answer
130
views
What is the appropriate test comparing two groups with pre-post design?
I have two groups (control and experimental), both have pre- and post-test scores.
A colleague of mine suggested that I use a one-way MANOVA to test the effectiveness of the intervention, with pre- ...
3
votes
3
answers
195
views
How to perform a joint significance test for multiple coefficients across several regression models?
I have 10 regression models, each regressing a different dependent variable $ y_i $ (for $ i = 1, 2, \ldots, 10 $) on the same independent variable $ x $. Each model produces a coefficient for $ x $, ...
- 96
0
votes
0
answers
12
views
Mixed modal MANOVA or something else?
I am once again asking for your help. I am developing a research proposal and I am a bit confused. I have a randomized controlled trial (RCT) for testing the efficacy of a therapeutic intervention, in ...
- 1
0
votes
0
answers
38
views
Why Do Different MANOVA Test Statistics Produce the Same Approximate F and P Values in R?
I am using the manova() function in R to perform multivariate analysis of variance on my dataset. I have tried using different test statistics such as Pillai's ...
0
votes
1
answer
22
views
Is it possible to run MANOVA without adjusting the Alpha level?
I have 11 dependent variables and two independent variables. I need to see the differences between the gender and academic level concerning the 10 most frequent grammatical errors and the total number ...
1
vote
0
answers
48
views
What non-parametric tests can be run to check the mediation analysis, since my data is not normally distributed?
I have two IVs (computed scores from likert scale) and one DV (computed scores from likert scale) IVs are Depression and Anxiety scores and DV is Social Connectedness scores. These are cintnuous. I ...
0
votes
0
answers
18
views
For a MANCOVA or MANOVA, is it true that "the pattern of group differences expected for all of the dependent variables is in the same direction?"
I'm considering performing a MANCOVA for a project, and during my research I came across a statement that gave me pause, quoted in the question title. You can find the statement in the middle of the ...
- 23
0
votes
0
answers
39
views
Which Analysis to Use for 2 Likert Scale Questionnaire Groups With Multiple Responses
I have a data set that I acquired through running a questionnaire. The questionnaire consisted of participants having to rate 80 different phrases using a 5-point Likert scale; ranging from Strongly ...
- 1
0
votes
0
answers
29
views
Distribution of between-group sum of squares (SSB)?
Consider a standard multivariate random effects model
$$\mathbf{X}_{ij} = \boldsymbol{\mu} + \boldsymbol{\alpha}_i +\boldsymbol{\varepsilon}_{ij}$$
for $i = 1,\ldots,m$ and $j = 1,\ldots,n_i$, and ...
- 79
2
votes
1
answer
66
views
Why does factor appear significant in 2-way ANOVA but not by inspection (mean +/- sd or error plot)?
I am puzzled about the result of a 2-way ANOVA analysis. The factors are categorical and non-random and the sum of squares used is constrained type III (the choice of categorical or SS type does not ...
- 165
0
votes
1
answer
89
views
In a repeated measures ANOVA, is the pairwise comparison result still valid if sphericity is not assumed?
For the pairwise comparison, the p value is less than 0.001. However, the p value for Mauchly's test of sphericity is also <0.001. I believe that SPSS automatically applies the Greenhouse-Geisser ...
0
votes
0
answers
79
views
Multivariate analysis with lmer and lmerTest
I'm dealing with compositional data (data that sum to 1). They are inherently multivariate. One way to analyse compositional data is with a ilr (isometric log-ratio) transformation. I'm following the ...
- 11
1
vote
1
answer
85
views
Intuition behind between-group covariance matrix from MANOVA?
Suppose that we have samples from $m$ different $p$-dimensional normal multivariate distributions, where they share a common covariance matrix $\Sigma$ but the mean vectors may be different for each ...
- 79
2
votes
1
answer
31
views
Which statistical test to use analyzing multivariate brain scan data (Channels, Frequency Bands, Measures)?
As a Computer Science student inexperienced in statistics, I'm looking for some advice on selecting the appropriate statistical test for my dataset.
My data, derived from brain scans, is structured ...
- 21
0
votes
0
answers
38
views
Question about Degrees of Freedom in MANOVA
res <- manova(cbind(Sepal.Length, Sepal.Width) ~
Species, data=iris)
summary(res)
When running the above code, the result will be as follows:
<...
0
votes
0
answers
48
views
Repeated measures MANOVA returning Pillai greater than 1
I am attempting to investigate the presence of a multivariate main effect using a repeated measures MANOVA.
I couldn't figure out how to include a table to share some data so I have included a ...
- 1
3
votes
1
answer
83
views
Quantitative Proteomic Analysis : ANOVA or MANOVA?
So, this may be a really dumb question but I'd rather ask it now than 3 weeks later when I'm neck deep into problems. The title is kind of self-explanatory but I'll expand a bit :
I've been tasked of ...
- 43
1
vote
2
answers
124
views
Follow up to MANCOVA and any possible alternative analyses
In my research, I have two categorical IVs and a DV:
A factor with 4 levels (mindset, encompassing 4 mindsets)
A factor with 2 levels (condition, encompassing 2 conditions)
A DV which is a composite ...
- 51
0
votes
0
answers
12
views
Which stats test--MANOVA or Mixed Effects?
I need to see if there's a statistical difference for each ID between CHLA, CWBA, and CH and what that difference is, AS WELL AS, if Species Type is a factor. Which R package would do this? I have the ...
- 1
1
vote
0
answers
12
views
All Individual DVs significant, but overall MANOVA not significant
I'm getting a weird result. Please check out the SPSS output below for CONDITION. All the DVs are showing significant results individually but the MANOVA is not significant. I've never seen this ...
- 11
1
vote
0
answers
27
views
Failure to meet the Scalar Invariance model
I did an 6 group experiment and I ran the multi-group CFA and failed to meet the Scalar model. I understand that the analysis should not compare means in that case but I can do MANOVA and SEM/...
- 61
0
votes
0
answers
27
views
What to do when I have insignificant results in one-way MANOVA?
I am currently in a blind fury attempting to write up a dissertation on the effects of positive and negative coaching on the performance of Rocket League players.
As far as I can gather, a one way ...
0
votes
0
answers
63
views
Analysis of longitudinal data with a change in DV - SEM, MANOVA or not possible?
I have a dataset in which a (latent) construct (e.g., math performance) is measured at different time points using different psychological tests.
The first data point is comparable to an assessment ...
- 115
0
votes
0
answers
40
views
2-way ANOVA interaction between a factor with itself, does not make sense?
I have done a DOE that I am in the process of analyze with a two-way ANOVA.
The DOE has been generated by the JMP software and I specified that I want calculate the main effects and the 2nd ...
- 1
1
vote
1
answer
68
views
Which type of statistical analysis to run in R with 2 treatment types in my study?
(Originally asked on Stack Overflow, reposting here after a commentor mentioned this is a better place to ask it.)
I have a seed germination study that I am trying to analyze. In this study I had 4 ...
1
vote
0
answers
26
views
Which statistical test - which sample is driving differences
I'm assessing whether the relative abundance of bacterial communities are different across two treatments.
I have a control (n=3), a food compost treatment (n=3) and a biosolid compost treatment (n=3) ...
- 11
3
votes
0
answers
125
views
How does one create comparable metrics when the original metrics are not comparable?
The problem I have is that I have several groups (say 3 to make discussion concrete) with observations from a true but known distribution $p^*_1, p^*_2, p^*_3$ (or 3 populations). I can compute some ...
- 7,074
1
vote
0
answers
270
views
Mahalanobis Distance critical alpha cutoff [closed]
I have two predictors and five dependent variables. I'm trying to figure out what the critical alpha cutoff for Mahalanobis distance is for a model with 5 DVs to check for assumption of multivariate ...
- 11
0
votes
0
answers
78
views
MANOVA or multiple regression, multivariate regression?
I am looking at the association between feature [ vividness, content specificity, and content narrative] - to three variables on the levels of Depression ( 4 levels - normal, mild, severe, and very ...
1
vote
0
answers
33
views
Which statistical test is more appropriate?
I have collected data for an experimental study from 88 participants. Specifically, all participants received both interventions but in a different order. 44 participants received firstly Treatment A ...
- 11
1
vote
0
answers
391
views
PERMANOVA - small and unequal sample sizes
I am comparing fish communities at 2 sites (upstream vs downstream) with data collected in two seasons (wet and dry) over several years (2017-2022), with data from the first pair of wet and dry ...
- 11
3
votes
3
answers
301
views
One-way ANOVA for multiple features?
I have 60 continuous features (i.e., lab results) for 35,000 patients, and the patients are divided into three groups. I want to evaluate each feature to find out what the differences are between the ...
- 31
0
votes
1
answer
61
views
Would I use a one-tailed paired-sample t- test on this?
I am doing an assignment that tests whether acceptance and commitment therapy is beneficial for social anxiety disorder.
With an experimental and controlled group.
I just need to know what test I ...
1
vote
2
answers
173
views
MANOVA (SPSS) test - determine control variables in moderation analysis
I am examining the moderating effect of IV1 in the relationship between IV2 and DV using hierarchical regression analysis. The study has 2 demographic variables: gender and age. To determine if it is ...
- 11
1
vote
1
answer
45
views
Repeated measures factorial ANOVA - independent variables from an equation
I have responses from 30 patients for 4 independent variables. ind_var1 has 2 levels, ind_var2 has 3 levels, ind_var3 has 2 levels and ind_var4 has 4 levels. No groups in the dependent variable. So ...
- 13
0
votes
1
answer
85
views
Should this be an ANOVA or a MANOVA?
I'm fairly new to statistics and am struggling to figure out whether I should be using ANOVA or MANOVA for my research design:
Participants will watch a performance together in one of three different ...
- 19
1
vote
0
answers
194
views
Can I run a Manova after conducting a cluster analysis?
So my study intends to conduct a cluster analysis using 2 variables (RP and AP).
I intend to find four clusters (AC, BC, CC and DC).
I would then like to examine differences in education, height, age, ...
- 11
1
vote
1
answer
6k
views
Non-parametric MANOVA, (multivariate) Kruskal-wallis, or data transformation?
I have one IV (faculty) and multiple continuous DVs and wanted to do a one-way MANOVA. As MANOVA requires normal-distributed data, I plotted the DVs and saw that they are heavily long-tailed (keep in ...
- 63
0
votes
1
answer
203
views
Normal and non-normal distribution of data?
I am quite an amateur in statistics. I have data where I would like to test if I can perform parametric or non-parametric testing depending on if the data is normally distributed or not.
The data has ...
0
votes
1
answer
138
views
Use of multivariate Shapiro Test for large sample size
I want to check for multivariate normality to conduct a MANOVA with two dependent variables.
Can I use Shapiro-Wilk test for multivariate normality if I have a rather large sample size (N = 1200)?
Or ...
- 1
0
votes
1
answer
1k
views
Two-way mixed repeated measures MANOVA in Python or R
I compare three groups:
A control group
Two different clinical populations
They are subjected to 6 different types of stimuli, several times each (repeated measures), and 5 dependent variables are ...
- 51
0
votes
0
answers
176
views
Time series regression with two dependent variables
I would like to find a suitable model for the relationship between multiple independent variables and two dependent variables simultaneously. Which model would you recommend me to use? If I understand ...
- 11