Questions tagged [mancova]

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Is Multiple Comparison Correction necessary for multiple ANCOVA tests

I'm working on fMRI data comparing brain activation from ten different brain areas across three groups after controlling for covariates such as age, sex, disease severity. I built an ANCOVA model with ...
SStt1002's user avatar
1 vote
0 answers
23 views

Multiple IVs and DVs with non-normally distributed data

I am performing a research study aiming at answering the research question: How does job design satisfaction differ between employees working in hybrid and remote work arrangements? For that I ...
JoaoFilipeClementeMartins's user avatar
1 vote
1 answer
109 views

Can we perform a MANCOVA for paired data?

I have data for a cross-over randomized controlled trial. I wonder if I can use MANCOVA to compare my outcomes (they are continuous) while having paired data. If I can't, what would be an appropriate ...
yusefsoliman's user avatar
1 vote
2 answers
68 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 ...
atk's user avatar
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1 answer
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Help deciding on a statistical test to analyze results of a survey

I created a survey to measure student perspectives on different subjects in Higher Education. In the survey, the students are asked what subjects they have experience with, and they will only be asked ...
Joseph Kim's user avatar
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15 views

Help deciding analyses - RCT

I am developing a proposal for an RCT. The IV/treatment has two levels - active control Vs experimental treatment. I plan on measuring EEG ERP baselines as predictor variables for treatment response. ...
Jeremy Wertz's user avatar
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7 views

Choosing the best and more useful method in RCT psychology studies

I'm not sure had anyone open this question but I'd like to your opinions. When we compare two groups(control&treatment) measured at pre,post and a follow up procedure, which is the most useful ...
Connor's user avatar
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94 views

MANOVA for a Moderator variable?

I just did a MANOVA to investigate the effect of the my IV on my three DV's. However, now I want to see if my Moderator Variable has anything to do with it. Can I just put my MV as a covariates? It ...
LilPoundCake's user avatar
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7 views

Is this a good model for Repeated Measures Mancova?

I surveyed 400 participants and each participant received 8 images to analyze, each image with the manipulation of 3 factors (A, B, C, AB, AC, BC, ABC, Control - no changes). Then, they answered the ...
Erica Castilho's user avatar
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0 answers
16 views

How to create dummy variable for within subjects?

I am running a mancova where each participant received 8 versions of a phishing email that combines 3 factors (A,B,C,AB,AC, BC, ABC, Control). I am measuring the level of risk (4 levels). My ...
Erica Castilho's user avatar
1 vote
0 answers
113 views

Pairwise comparison for interaction effect using Repeated Measures Mancova

I am using a Repeated Measures Mancova with 4 factors, each one with 8 groups. I also included 3 covariates in the analysis. I discovered there was a significant difference between at least two ...
Erica Castilho's user avatar
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173 views

MANCOVA Model in R

I want to investigate the impact of marital status on the perceived sense of meaningfulness in people's live and control for gender and age. So I have 6 different groups for marital status and an ...
Newby_101's user avatar
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128 views

Statistical relation between mutually exclusive variables

I am quite green at Statistics.Thank you so much in advace for any help you can offer. My doubt comes from this situation: You have a set of behavioral data, with several possible behaviors and a ...
Alex Sospedra's user avatar
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1 answer
126 views

Calculating risk difference with covariate

How do I calculate a risk difference for a binary outcome that takes into account a covariate? I want to compare accuracy of a skilled and unskilled tester at detecting 7 different types of tumors. ...
gecko's user avatar
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2 votes
0 answers
36 views

Suitability of one-way repeated measures MANOVA

I'm undertaking a research study where I want to look at the difference between the value of a variable before and after an intervention. I've been suggested the one-way repeated measures MANOVA ...
Ananya's user avatar
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1 vote
1 answer
1k views

Box's M fewer than two nonsingular cell covariance matrices

would appreciate some help with the following problem. While running a MANCOVA i received the following error message from SPSS: " Box's Test of quality of Covariance Matrices is not computed ...
Mikhael's user avatar
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1 vote
0 answers
127 views

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 ...
Jessica's user avatar
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1 vote
0 answers
947 views

two-way MANCOVA with two covariates in SPSS

I am running a two-way MANCOVA which needs to be adjusted by two covariates. Problem is, I am not entirely sure whether I clarified all assumptions correctly and how to finally deal with two ...
RSB's user avatar
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1 vote
0 answers
29 views

How would you do a moderation analysis?

I'm currently analysing data on an experiment I have run in connection to my BA thesis, but as I'm not that statistically strong, I have run into difficulties and I hope you will be able to help. ...
Niels's user avatar
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1 vote
0 answers
57 views

Anconva or Anova for multifactor analysis

I have non-normal plankton community data, where rows are sites and columns are species (dependent) and a few factors. I want to check the influence of season on community (dis)similarities but am ...
Jim's user avatar
  • 113
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0 answers
37 views

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 ...
b2bt's user avatar
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0 votes
1 answer
33 views

Choosing Statistical Test for my dataset

I was wondering if someone could help me. I have a dataset from a clinical trial which tests the impact of therapy on a group of cannabis users with psychotic symptoms. It's a randomised control trial ...
MegAtron's user avatar
0 votes
1 answer
190 views

Am I fishing for significance?

If my multivariate analysis of covariance shows that my covariate does not account for significant differences is it wrong to follow up with a standard multiple regression? I know MANCOVA is under the ...
Tash's user avatar
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1 vote
1 answer
54 views

What is the best statistical test for this data with multiple predictors?

have a set of data as follows where we measured the change in aluminium or copper according to time, concentration of sediment, temperature and the site the water was taken from. Here is a sample of ...
LucySHE's user avatar
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1 vote
0 answers
348 views

Do I need to use a Bonferroni adjustment after a MANCOVA?

My thesis supervisor insisted I do a MANCOVA with 5 dependent variables. However to answer my research questions I need to use the results of the subsequent 5 univariate tests SPSS automatically ...
Urszula 's user avatar
1 vote
2 answers
185 views

Which statitical modeling in more appropriate when there are several yi? (MANCOVA,Multivariate regression, canonocal correlation)

I have these variables in my data set: a categorical variables with 5 levels (Country) sex a continuous variable (grade) ...
Mehrbanoo's user avatar
1 vote
2 answers
1k views

Dependent variable with two dimensions; which statistical test is appropriate?

I do have a dependent variable with two distinct dimensions (factors). In total the dependent variable do have 10 items. The first 5 items belong to dimension 1 (as sub-dimension of the overal ...
Raphael's user avatar
  • 173
0 votes
1 answer
646 views

MANCOVA homogeneity of regression slopes

I am examining the difference in illness models (by asking several questions: DV) for refugees and non-refugees (IV). In addition, we asked about several confounding variables / covariates (...
T.H.'s user avatar
  • 1
2 votes
0 answers
47 views

Data analysis for two groups?

I have a data set for two groups i.e. control group and treatment group. They are two different group from the same socio-economic background. But the treatment group has participated in co-management ...
KH. Kabir's user avatar
1 vote
0 answers
331 views

Interpreting/Reporting means for a MANCOVA

I did a study on whether people have a chronic illness (dichotomous variable, 1 or 0) and several measures of psychological well-being. Two questions: 1.) Does one report the means of the raw scores (...
MSP's user avatar
  • 21
0 votes
1 answer
528 views

How to measure variance in a classification dataset?

I have a dataset that contains 20 predictor variables (both categorical and numeric) and one target variable (2 classes - Good and Bad). But, there are only 23 observations in the dataset. While I ...
Minu's user avatar
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1 vote
1 answer
642 views

Is it ok to repeat MANCOVA until all interactions are significant

In order to enlighten the relation of three (related) scales describing psychopathology (1 anxiety score and 2 shame scores) with demographic data (gender, place of residence, age etc) collected by ...
Epameinondas's user avatar
1 vote
0 answers
31 views

covariate in ANCOVA [closed]

I have two groups I want to compare- drug and placebo- on a few dependent variables from neuropsychological tests. I ran a MANCOVA using only one covariate (related to the DV) and I found two out of ...
neuronik's user avatar
1 vote
0 answers
2k views

How to perform a MANCOVA in R

I have been looking around and cannot figure out how to perform a Mancova in R. independent variable: cluster number dependent variables (multivariate): body shape (19 partial warp scores) covariate: ...
MBrachmann's user avatar
1 vote
0 answers
30 views

Paired test with 2 dependent variables

What test should I use to find out what effect an intervention has on two dependent variables? I have a test group of clinically depressed that will undergo a sports program. The program is expected ...
Laura's user avatar
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1 vote
0 answers
282 views

What does the p value for a covariate in a two-way ANCOVA (or factorial ANCOVA) really mean?

Given that the covariate aims to reduce the variance in the error term, what does the p-value mean for a covariate in a two-way ANCOVA? I assume the "correction" is applied no matter what the p-value ...
nightale's user avatar
1 vote
1 answer
1k views

How can I conduct a non-parametric version of MANCOVA?

Is it possible to transform my variables to their ranks and apply MANCOVA to the transformed data, just like how it is done in rank ANCOVA?
statsmajor's user avatar
3 votes
0 answers
155 views

Non normally distributed data and comparing correlation

I have data from a research that was conducted by me, the data refer to four conditions made of two levels of time (pretest and post-test) and two levels of group (control and intervention). Shapiro-...
Gilad Sabo's user avatar
0 votes
0 answers
54 views

Which statistical method can I use to see if there is a correlation between data sets with different size?

For my thesis I want to compare the 3 different test results. If the results are more than 5, samples are failed. And I want to show if these tests are similar behaviour (if there is a correlation ...
Kiba's user avatar
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0 votes
0 answers
364 views

Univariate tests of a multivariate model (MANCOVA)

When running multivariate analysis with covariance, the multivariate tests showed all covariates not to be significant, but the grouping variable was significant. When moving onto univariate tests (...
Anabelle001's user avatar
1 vote
1 answer
2k views

MANCOVA reporting

I just ran a MANCOVA to compare my grouping variable with my dependent variables whilst controlling for my covariates. I am running a descriptive study, therefore already by looking at descriptive ...
Anabelle001's user avatar
0 votes
1 answer
482 views

Working on my dissertation, and need to figure out whether to use MANOVA, MANCOVA, Multiple regression, or multivariate regression

I am working on my dissertation, and I am having a hard time choosing a statistical model to follow. I am using an existing dataset. The results of the dataset are self-reported. There are more than ...
Shawn D.'s user avatar
1 vote
0 answers
338 views

MANCOVA with categorical moderator - it is possible?

I have two continuous variables which are my DEPENDENT variables and two PREDICTORS which are continuous too, but I need to test with MANCOVA an interaction of a third variable (moderator), which is ...
Isa's user avatar
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8 votes
1 answer
21k views

How to do MANCOVA in R?

I have two groups of persons, GRP0 and GRP1, on which I measured three continuous variables: VAR1, VAR2 and VAR3. I would like to use Mancova in R with: - VAR1, VAR2 and VAR3 as outcome variables - ...
michael's user avatar
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8 votes
1 answer
547 views

What is the intuition behind (M)ANCOVA and when/why should one use it?

As per my understanding here's the what/why/when of the following hypotheses tests in a crude sense: t-test: Used when comparing means between two samples ANOVA (one way): Used when you have one ...
PhD's user avatar
  • 14.6k
1 vote
1 answer
908 views

MANCOVA or several ANCOVAS

I am analyzing pre- and post- intervention data for which I have 6 dependent variables for two groups (treatment, no treatment). I want to know if, controlling for pre scores from the 6 measures, post ...
redracer's user avatar