manova

  1. K

    Statistical test advice, currently thinking a MANOVA test.

    Hi, I'm sorry to bother everyone. I am collecting samples (continuous data) from 5 defined sites which can be split into 5 categories (A-E) (1 sample split into 5 equal sections), and will be doing this to gain a minimum of three repeats. The data can be split into 5 different size categories...
  2. S

    MANOVA, when independent variable is not multi-level and P value significance varies!

    My research has 4 independent variables and 4 dependent variables. My hypotheses are constructed in such a way that 1 independent variable's effect size is checked on 4 dependent variables. My independent variables are not continuous but they are measured on a 7 item likert scale. And my...
  3. J

    ITT and per protocol analyses. How to do both and how to compare baseline measures.

    Hello, I have read about but cannot find the answer to my queries. I am doing a study looking at the effects of positive thinking (PT) and exercise on depression. I'll be measuring at LEAST 2 outcomes. So far, depression levels and quality of life score levels using standardise inventories...
  4. H

    Calculating omega squared from spss manova output

    I'm trying to calculate omega squared from my output, googling led me to this formula w2=(SSeffect - (dfeffect) (MSerror) / MSerror + SStotal From my output i gather that SSeffect is the sum of squares for my dependent variable, the dfeffect is the degrees of freedom for my dependent...
  5. B

    Calculating sample size for a two way MANOVA using gpower?

    Hi! Just wondering if anyone can help me with this? My normal go to textbook - Quantitative Psychology by Clark-Carter - doesn't cover multivariate stats in great depth and for my project I am planning to do a two way MANOVA. The free Gpower 3 has been recommended to me, but there are no...
  6. K

    3 Dependent and 4 Independent Variables...MANOVA?

    Hello all, My study recorded 3 continuous dependent variables in relation to an ordinal experimental factor. However, there are 3 categorical bias factors that may have effected the results (some preliminary analysis leads me to believe that only 1 of these had any significant effect). I'm...
  7. W

    MANOVA / testing multivariatie normality

    Hi all, I'm doing an MANOVA with two dependent variables and one fixed factor (three levels). It is said that I need to test for multivariate normality. What is the right way to test for multivariate normality in SPSS? Do I need to test per level or all levels together? best regards Wilbert
  8. S

    Beginner Question- MANOVA error in R

    Hi, I have repeatedly tried to conduct a MANOVA in R but my output keeps returning "no error degrees of freedom". I have three plots each with multiple sample sites, with each sample site sampled 3 times (over 3years). I wish to compare the plots with each but also for differences in each plot...
  9. L

    MANOVA output- What does this mean?

    As I forgot to ask my supervisor yesterday. I have run a MANOVA on two DVs, and in the Multivariate Tests table it says that the main effects of Group and Time are not significant, but that the interaction effect is (Group x Time). I conducted a pre-post intervention study, so I do want...
  10. H

    Help deciding which statistical test to use in SPSS?

    Hi All, I am completing some research and wanted to double check that I am using the correct statistical test to analyse my data in SPSS. I was to look at whether Voting in the community (Categorical response Y/N answer) impacts on the participants feelings that their views are being heard...
  11. L

    Statistically Challenged Psychology student!!!

    Hi everyone, I am really hoping that someone here can help me out. I am really struggling with the analysis for a Psychology study I have conducted, and have lots of questions :( I find stats really difficult, and just cannot begin my analysis yet because I am so stuck. I will try to give some...
  12. 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...
  13. G

    Help with statistical analyses with only small sample size and multiple DV's??

    I am looking at the relationship between Schizophrenia, Substance Abuse and Neurocognition. I have 30 P's with Schizophrenia and 30 matched-controls (who are matched on age, gender, education level, IQ, and level of substance use), who have been administered a neurocognitive battery of 11...
  14. F

    SPSS error 12005 manova

    I have been having problems with SPSS. When I try to run a data set it says: >Error # 12005 in column 14. Text: -4 >A parenthesized value range in the MANOVA procedure contains a lower limit >(the first value) that is greater than the upper limit (the second value). >Execution of this command...
  15. M

    HELP - very strange error in my values

    I was attempting a post hoc test after running a manova in spss and it would not run because "one group has fewer than two cases". Before I go further, let me make it clear that this is incorrect. In the Between-Subjects Factors table, my values are listed as follows: Identity: 1...
  16. D

    Help with Defining the null hypotheses for Manova

    Hi all, I'm trying to test the combination of 4 different treatments therefore I have 16 different groups with different combinations of the treatment. I have 4 DVs that represent a single construct. I would like to proove (or statisticlally show): 1 - what is the best treatment 2 -...
  17. J

    Test selection help for multivariate response and predictors

    I need help determining what method would be applicable to the following situation. There are 2 chemicals, A and B. Also, there are two organisms, say Jim and Kelly. It is impossible to separate Jim and Kelly. Although, sometimes, levels of Jims or Kellys might be slightly more than the...
  18. L

    repeated measures MANOVA - 3 measurements in time - interpretation

    Hello, I am running a repeated measures MANOVA (in SPSS) to determine whether there are statistically significant differences in a group over time (pre-intervention, post-intervention, and 1 month follow up). After entering all the variables in for all 3 measurements, the multivariate...
  19. P

    actual prices and two predictions -> ANOVA or MANOVA?

    Hello everybody, I'm unsure which stats to use for the following problem: I've got a list of prices for stocks of a certain date. In that list I also have two predictions for prices for the same date. I want to see which prediction is better and whether there is a difference in predictive...
  20. B

    Multivariate analysis with dependent variables and replicates

    Dear All, I have been stuck in this issue for 2nd day now. I have a dataset of 13 depended variables (consequitive (not repeated!) measurment ("profiles" from one batch of product) and there are 3 batches (replicates) and within each batch there are 10 containers. So I am dealing with...