mancova

  1. C

    MANCOVA with 2 dummy variables (Question about interaction probing)

    Hello! I am running a MANCOVA with two dichotomous IVs and a 4 continuous DVs for my Master's thesis. When the first edits came back, I was asked to write about post-hoc probings of significant interactions. I am having a hard time understanding how one would "probe" these types of interaction...
  2. J

    MANOVA or repeated measures anova or ANCOVA?

    Hello! For my thesis I want to compare 3 training groups (2 different types of training and 1 control group) to see the influence on mindfulness-skills and exhaustion level (so 1 IV- type of training- and 2 DV). All the participants get a pre and post test. I'm doing the analysis in SPSS, but...
  3. R

    Which test is appropriate for pre and post test (between and within subjects)?

    I have conducted a study where participants are split between two groups (treatment and control). I want to measure changes in depression and sleep disturbance pre and post-test (before and after intervention). I want to see interactions between-subjects for depression and sleep. I also want to...
  4. S

    Multiple ANCOVAs: Post hoc Bonferroni, FDR, or can I use MANCOVA?

    Hi, I am comparing a protein level in multiple (40 to 4000 depending on the analysis) brain areas across three diagnostic groups, with a couple of covariates. I am using ANCOVA to compare the three groups. What is the best way to account for multiple comparisons? Where I am conducting large...
  5. N

    Planned a MANOVA, but data may suggest a MANCOVA

    Hi there! Thanks for taking a minute to help me. I'm in the final days of my PhD and running analyses for my final study. But the longer I look at my data, the more I am beginning to think my planned analyses do not look like they make sense. I really need someone here to act as a sounding...
  6. K

    MANCOVA MANOVA_assumptions_ heterogeneity of regression slopes

    Hallo there :wave:, I am examining the difference in illness models (by asking several questions: DV) for refugees and non-refugees (IV) (both n= 100). In addition, we asked about several confounding variables / covariates (demographic data). I hypothesis that DV (illness model) will differ...
  7. K

    MANCOVA MANOVA_assumptions_ heterogeneity of regression slopes

    Hallo there :wave:, I am examining the difference in illness models (by asking several Likert scale type questions: DV) for refugees (n=100) and non-refugees (IV)(n=100). In addition, we asked about several confounding variables / covariates (demographic data). I hypothesis that the illness...
  8. P

    ANOVA vs MANCOVA

    Hello. I'm doing a study on people with high vs. low self-compassion and I want to compare them on a number of variables. Self-compassion in this group varies by age, so I want to do ANCOVAs to compare means while controlling for age. My question is this: since SPSS only allows you to do...
  9. G

    Comparing between correlation coefficients

    Hi, I have experimental design which includes 3 dependent variables (Reading Mind in the Eyes test and 2 other measures of social cognition, for the matter of this thread lets call them A, B and C). They are continuous variables. The first research hypothesis was that following treatment...
  10. M

    heterogenous regression slopes in mancova

    Hey guys, I have a little problem with my MANCOVA data (4 DVs, 3 Covariates). For one of the covariates and one of the DVs, the assumption of homogeneity of regression slopes is violated. Does this mean my overall MANCOVA results may be affected or does this just concern the single DV in...
  11. C

    MANCOVA and step-down analysis

    I have a question concerning the use of step-down analysis after MANCOVA. While I understand the steps for MANOVA, when I started using a covariate (MANCOVA) I became confused. Do you still do step-down analysis after a significant MANCOVA test? If so, do you use the covariate as part of that...
  12. P

    Testing whether two related slopes/intercepts are different from each other

    Hi, I'm new and stuck. I want to see if the intercepts and slopes of two linear regression lines are significantly different. I thought I found the solution but now it looks like that might not work because the data is overlapping. Specifically: I have data for X, Y1, and Y2. I can find the...
  13. M

    SPSS v21 - MANCOVA post-hoc test - post-hoc box grayed out

    Hi everyone, I'm looking to run a Tukey post-hoc test in GLM-->Multivariate with covariates (MANCOVA). When I add covariates I can no longer select "post-hoc" - the box is grayed out. Also, I can't click "compare main effects" in the options tab. Why is this? I have seen a thread...
  14. E

    MANCOVA help!

    Hello, Can anybody help me out? I have had my head in books for ages now and I feel like I am going a little mad! They are either too basic or too complex to answer my questions. As part of my MSc I have performed a cross-sectional survey and I am looking to analyse the following variables...
  15. L

    Which test should I use for multiple variables, multiple sites & non-parametric data?

    Hi All, I've spent the past two weeks trying to figure out which test to use and have gotten nowhere so hoping someone here can help! I have been given data for 4 sites, where the percentages were recorded for a number of variables, including leaf litter cover, rhododendron cover, light...
  16. E

    Use of extracted factors from EFA with Mancova in SPSS

    For a 2x2 between subjects factorial analysis, I need to test interaction effects of 2 IVs each having 2 levels. The questionnaire has multiple items and I would first like to run FA to reduce DV data and further use it with Mancova. What needs to be achieved: 1. how the extracted data can be...
  17. G

    MANCOVA interaction effect

    Hello everyone, I am facing the following problem: I conducted a MANCOVA to investigate whether a control group significantly differs from 2 other experimental groups with regard to 4 different dependent variables. There was a covariate included which was supposed to moderate the relationship...
  18. C

    Multiple ANOVA or MANOVA or MANCOVA?

    I have collected data on a set of student variables in an undergraduate course (GPA, frequency of participation in class discussion, homework completion, exam performance, and year in school). My main hypotheses pertained to exam performance and homework completion (using different reinforcement...
  19. A

    Which method i have to use?

    Dear my friend. I am working on research on supplement. I have 4 group in creatine supplement and placebo ( creatine+ exercise, creatine+ no exercise, placebo+exercise, placebo non exercise). pre and post test was before and after five weeks. anaerobic power was measured in pre and post test...
  20. A

    MANCOVA with all predictors being continuous variables - how to follow-up?

    Dear Stats Experts, I would be most grateful for any thoughts on the following: I have a cross-sectional dataset with 7 outcome variables from 100 subjects. The outcome variables are of equal theoretical priority and are moderately correlated. I chose MANCOVA because I am interested in the...