# Tagged Questions

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

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### Research Study What to use statistically? why type research design?

I would like to know what type of statistical analysis needs to be used for this study. The study will involve 8 throwers and 8 cross-country runners. They will use a machine to determine the ...
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### kruskal wallis post hoc test for negative and positive values

I have 10 means and I want to test if there is a significant difference between the groups. The means are composed of cost values that can be negative and positive. I read here the kruskal test can ...
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### MANOVA, Confirmatory factor analysis and nonnormality

I'm conducting a validation study of a neuropsychological test. I want to use a confirmatory factor analysis (using AMOS) to test whether the theoretical model behind the test is valid. I've got two ...
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### Manova, mixed models or what?

I have difficulties in choosing the appropriate statistics to use for my data. In particular I don't know whether I have to use a MANOVA or a mixed model. Let's suppose, I have three dependent ...
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### How to convert two different types of measurement (both in ms) to run a MANOVA?

I measured reaction time and movement time in an experiment (within-subjects measures) and want to run a MANOVA in SPSS with these measures as the two dependent variables. They are both in ...
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### Interaction Contrasts in SPSS

I am trying to run a 2x2 MANOVA with two sets of categorical independent variables (V1: healthy weight vs. overweight) (V2: binge eating diagnosis vs. healthy controls), on continuous dependent ...
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### Determining the correct test for experiment design

I'm trying to figure out the right test to use for my experimental design, I was hoping someone here could help. Here's the structure: Two independent variables, IV1 and IV2. IV1 has 3 levels, IV2 ...
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### How to compare means of 3+ variable within a sample group

Grip strength for 128 athletes was measured at 3 various elbow angle (90, 180, 45) with varying position and arm posture. Now I want to compare means of dependent variables within each elbow ...
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### Model ratio in a one-way repeated measures ANOVA in R?

I've got a dataset with two measures in a group of people, before (pre) and after (post) an intervention. Second measure is always greater than first one. My assumption is that the initial value ...
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### Repeated Measures MANOVA with contrasts?

The data that I am using consists of 74 people that answered three DV once (each of them once). I had a 2x2 design, with Context x Intensity as IVs. I have done a MANOVA on the data but my supervisor ...
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### How to prepare data for anova or manova

I have a datafile (below is Gdrive link) and I want to prepare it for Anova/Manova tests. About Data: ...
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### ANOVA with continuous time signal

I have a very large data set of a continuous time signal as measured force(N). I want to do a 4-way ANOVA to compare 12 groups in this data (or compare the signals). My question is, how should I ...
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### MANOVA interaction effect wont compute

I am performing a MANOVA with a large multivariate dataset representing total body shape (dependent variable). My two independent variables are gender (sex) and cluster (from a previously computed ...
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### Permanova for microbial ecology using adonis (R): should I include block?

I know this is a very basic question, but I have been quite unsuccessful in finding a good solution to the following issue. First the data. My spreadsheet is too big, so here is a fictional example: ...
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### Repeated measures MANOVA for testing difference among multivariate time series?

I measured behavioural multivariate time series (3 variables) from 7 dyads performing an experimental task. For each dyad, I have a multivariate time series (that is, I don't have data from each ...
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### Multivariate GLM or MANOVA or other alternative for 2x2 repeated measure experiment?

I am trying to get my head around the right choice of experimental design and analysis for a collaborative software I have created and would like to evaluate. The software allows groups to conduct a ...
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### How to read the output from MANOVA?

I'm testing if/how the two factors C and V affect the dependent variables fric and ...
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### Application of Anova/Manova

I have a dataset providing information about head and leg injuries for drivers and passengers . The dataset contains the following variables Head.IC: Head injury criterion(number) Chest_decel: Chest ...
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### How the total pseudo R2 is calculated with the “dissmfac” function in TraMineR?

I am using the discrepancy analysis in TraMineR. I performed univariate analysis with "dissassoc" to measure the effect of each variable. Then, I did a multi-factors analysis using "dissmfac" to ...
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### What multivariate test to use when variables need to add up to a constant?

My data have three levels. The highest level is preferred vs. actual state. For each state there are 6 dimensions. Within each dimension there are 4 variables representing scores of 4 kinds of ...
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### Non-parametric analogue of a one-way MANOVA

What is the best test to perform a non-parametric multivariate analysis of variance? I have 4 levels of 1 factor, $n=60$ statistical units and 30 dependent variables.
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### The use of MANOVA, ANOVA or t-tests for Likert-style data

I have two groups I would like to compare on a series of Likert-style mood dimensions (e.g. Very Sad - Slightly Sad - Neutral - Slightly Happy - Very Happy). The sample sizes are 19 and 63. The data ...
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### Alignment / matching problem with groups

I have two data sets (base and to_match), each with 10 individuals, grouped in 2 classes. Each individual is described by a set ...
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### How is MANOVA a case of the GLM?

It's easy and convenient to teach students the following regression equation $$Y=\beta_0 + \beta_1X_{\text{(continuous)}} + \varepsilon \\ \text{where }\varepsilon\sim\mathcal N(0, \sigma^2)$$ ...
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### regression analysis or MANOVA or..?

We have this data from 5 different treatment groups with a different sample sizes and need some help for analysis. Participants were randomly assigned to a group and were exposed to a certain ...
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### Which analysis do I use for this experimental design?

Seeking feedback from those with a better quantitative mind than my own! Currently preparing my doctoral research proposal. I want to determine the impact that various levels of technology (...
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### Bonferroni correction in MANOVA

so if I've done a MANOVA and followed that up with Bonferroni correction and found that only 2 out of 7 variables are significant (whereas before there were a few more) does that mean that only these ...
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### Repeated measures MANOVA with NO between subjects variable

I'm struggeling with the choice of the proper statistical method for my dissertation in clinical psychology. About my research: - 2 Dependent variables (two different questionnaires; 'dysfunctional ...
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### MANOVA or ANOVA

I have 3 DVs that are correlated, and 2 IVs. I measured the DVs on 2 occasions. There is no control group, just a single group. Should I use repeated measures ANOVA or repeated measures MANOVA to ...
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### Application of repeated measures ANOVA for differentiating pre-treatment and on-therapy groups

I have conducted a clinical trial using three different medications. Three different medications were given to three different groups selected randomly. I have measured a biomedical indice (multiscale ...
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### MANOVA + machine learning

If I fail to reject the null hypothesis of MANOVA at an alpha level of 0.05 in my dataset... am I trying in vain to apply machine learning classifiers and regression algorithms on it? Thanks,
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### Transformations possible when performing a single multivariate ANOVA on a continuous and categorical species database?

I want to study the impact of aquaculture on a hard rocky seafloor community which is naturally low in diversity. 4 replicate images (0.25 m2 each) were taken at fixed distances (0, 20, 40, 80, 120, ...
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### What stat test to use and help with code in R (for a beginner)?

i am just wandering what test to use for the following trial: I have a one treatment at 9 different rates (untreated, 100g, 200g etc) and I want to see how 4 continuous dependent variables and 2 ...
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### What is the best approach to test 2 independent groups on 4 DV's?

So I have 1 IV that consists of 2 categorical groups. Both groups complete the same four tasks, the 4 DV's in my study which are continious. I planned a MANOVA, to see whether the DV's are different ...
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### Nested Manova with random nested factor won't run!

I'm running a multivariate analysis on a nested design with a random factor (Site) nested within a fixed factor (Region), with five dependent morphological variables. I have two sites within each of ...
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### Hypothesis testing for matrices of RVs

I looking for the correct statistical test for comparing matrices of random variables - my IV being a categorical variable and my DVs being n by n matrices of random variables (which are themselves ...
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### Quasi-experiment: sample size & statistics

I am conducting a quasi-experimental research in a school, where I have access to 100 students who are chosen as classrooms and who will be the participants of the study. I am interested in the ...
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### What does it mean if your Mean Squares and F value are very similar?

I am running three separate MANOVAs in SPSS. When I run my tests the results for the tests of Between-Subjects Effects shows that my Mean Square and F are very similar across all the variables I am ...
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### How to compare two sets of time-series 3-Dimensional data?

Let us say we have two data sets. Each of the data sets has velocity $(v_x,v_y,v_z)$ and acceleration $(a_x,a_y,a_z)$ of particles at time steps n where $0 \leq n \leq 100,000$. Now how do I compare ...
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### Is it possible to calculate cohen's d from nonparametric statistics?

I am working on my thesis and my supervisor wanted me to calculate cohen's d for my significant results. I am using SPSS and I was able to calculate Cohen's d using an external site. My independent ...
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### Repeated measures ANOVA or MANOVA (SPSS)

Statistical help needed. I have an experimental design of two independent groups (pregnant/non-pregnant), in which each person has described past memories and future episodes on different variables on ...
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### How to analyze a Semantic Differential?

1) How do we statistically analyze data from a semantic differential? I have seen the results rendered as a graphic joining each point as such
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### Looking for the best data analysis

I am currently in my dissertation phase and I am stumped on what data analysis I should be using. I am looking to evaluate resilience differences in genders. I'm using a non-experimental, causal ...
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### experimental research design

In an experiment, same group of participants are required to test (low and high) visual quality of a user interface. The goal is to find whether perception of usability is affected by any of the low ...
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### Comparing two groups with different size on multiple continuous variables [duplicate]

I want to compare two groups on 9 continuous variables to see whether mean scores on these variables differ between the two groups. However, my samples have a very different size: one group includes ...
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### Planned Contrast after MANOVA and RM ANOVA

Im not sure I will get much help on this but this is a last resort. DESIGN I have 2 Independent Variables: 1) Group (Experimental and Control) 2) Time (Baseline, Post-Intervention, Follow-up) I have ...
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### DFA in SPSS: Sorts effectively, but Box's M is still 0.000. Is the analysis worthless?

I am a geologist attempting to apply the discriminant function analysis to surface features I have mapped in ArcGIS. At the moment I have 4 dimensionless sorting variables calculated for each feature, ...
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### Can longitudinal studies ever be treated as having independent observations?

This may be a dumb questions, but for sake of statistical analyses I'm wondering if the data of a longitudinal study can ever pass the assumption of having independent observations? For example, I am ...
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### How to interpret P-value from mixed model and P-value from overall ANOVA?

I fitted mixed effect model with several effects with lme package in R by command ...
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### Research Design Strategy

The total number of participants in a study is 70. This sample is divided into two groups. Group A (35 participants) and Group B (35 participants). The purpose of the study is to investigate the ...