repeated measures

  1. S

    Repeated measures GLM - restricted permutations

    Hi all, I have some multivariate data (species counts) and want to investigate the effect of some treatment over time. I am using the mvabund package in R, which fits a separate GLM to each species. Specifically, my data are invertebrate taxa collected from pitfall traps under two...
  2. C

    Issue in Interpreting SPSS output of GLM repeated measures

    I have a data set with repeated measures for each individual. That is there a re two groups, treatment and control. And each individual is measured at 3 time points. But there are missing values. That is I don't have data for all 3 time points for all of the individuals. I carried out a SPSS GLM...
  3. K

    Monte-Carlo simulation of repeated-measures ANOVA

    Hello, I want to conduct a Monte-Carlo simulation of a repeated-measures ANOVA. The random numbers used for the simulation need to have specified mean values, standard deviations and correlations between the levels of the repeated-measures variable. Generating random nubers with a...
  4. M

    Repeated measures Anova in SPSS (3x2) different factor levels

    Dear all, I'm trying to find out how to run a repeated measure anova for a 3x3x2 design with two within subjects factors in SPSS. The problem I face is that when I want to enter a factor with two levels and a second factor with three levels, SPSS asks for six within subjects variables...
  5. R

    How to set up manova in MATLAB for multifactor analysis

    I have 4 independent variables: Frequency (within-subjects, continuous, 16 levels) Amplitude (within-subjects, continuous, 3 levels) Time (between-subjects, continuous, 7 levels) Status (within-subjects, categorical, 2 levels) and 2 dependent variables: Storage (continuous) Loss...
  6. A

    longitudinal analsis of dichotomous variable in SPSS

    Hi all. I'm stumped. I have a dichotomous (yes/no) variable that I have assessed at 4 different time points. I would like to analyze this variable to see if/how it changes over time, but honestly don't know how. I can run a bunch of chi-squares, but i'm pretty sure that doesn't really address...
  7. K

    Analysis for a repeated measures design with covariate that varies over conditions?

    Hi all, I'm trying to find the correct analysis that will allow me to carry out the equivalent of a repeated measures MANCOVA with a covariate that varies over three conditions. Basically I have an experiment with 3 different types of task where every participant does every task in a...
  8. M

    Repeated Measures Nested Model in PROC Mixed?

    Hello, I'm looking for help analyzing data. Here's the experimental setup: 12 experimental plots, divided into 3 blocks. Each block is a factorial combination of two treatments (precipitation, nitrogen). Within each plot, I have 3-6 trees of species A and 3-6 trees of species B...
  9. M

    Non-parametric repeated measures guidance needed

    What I am studdying is Aspergillosis (a disease) -it is caused by the terrestrial soil fungus called Aspergillus sydowii - of the sea fan Gorgonia ventalina. What I know so far: 1) My data is non-parametric....Residuals are not normally distributed and transformations do not help. 2)...
  10. A

    Help With Repeated Measures ANOVA

    Okay, so I have got 15 subjects, who had to perform a repeated sprint test (5 sprints) twice one with a supplement then the other with a placebo the following week. I now have times for with supplement and placebo for every single subject and need to perform an analysis using SPSS. I believe I...
  11. B

    Analysis of a longitudinal study where interventions are received at different times

    I have a data set of university students. The university has 8 different assisting programs, mostly like scholarships, for needy students to help them concentrate on their studies. Since it costs a lot of money for the university to run these programs, it opts to evaluate how effective each of...
  12. K

    Dealing with missing data in Repeated-measures ANOVAs

    Afternoon all, I've been running a longitudinal follow-up study to assess outcomes following a psychological treatment for ME. As to be expected, there was a lot of drop-out by 12 months, the 5th time point of the follow-up. Usually I'd do a RM ANOVA to analyse this, but with the missing...
  13. R

    longitudinal multivariate data - multivariate repeated measures

    Hi! Am dealing with a multivariate longitudinal data where we collect data from two group of subjects (cases and controls) at baseline , one month , two month, and at three months . At each of these four time points we collect data (which basically consist of 4000 variable of which many of...
  14. C

    RM ANOVA vs. ANCOVA question

    Hi stats friends! I'm trying to decide whether to use an RM ANOVA vs. an ANCOVA to test a question and I could use your help. Participants were randomized into 3 groups (categorical between-subjects IV: Factor A), and two continuous variables (let's call them B & M) were measured at 3 time...
  15. J

    Expectation eaximization with repeated measures data

    I use SPSS 21. I have repeated measures data with multiple time points. After the first time point every other time point (two follow-up time points) has significant participant attrition (close to 6oo participants at baseline and around 400 at each follow-up time point). I would like to use...
  16. M

    Which approach to use? Repeated measures with a covariate

    Hi, I hope that someone can give me a pointer please. I am trying to determine which is the most appropriate test to apply to my data. I have some data which were originally formulated for a 2x2 Repeated Measures ANOVA. I was particularly interested in the A*B interaction. However, having...
  17. G

    Desperate call for statistics help

    Hello, I've just finished my placement year in my undergraduate degree but I'm really stuck with which statistical tests I need, and how to input the data into SPSS. Any help would really mean the world. Introduction to study: Working within a community mental health team. Researching whether...
  18. A

    MLR equivalent for repeated measures, multiple correlated responses

    I'd like to determine the best approach to determining effect sizes for a set of experimental data with multiple correlated responses. Due to repeated measurements and high correlation between responses, I know that a simple multiple linear regression model obviously isn't the answer. The...
  19. K

    Nonparametric/Ranking Data Help!!

    Hi all, I am a PHD student attempting to come to grips with an analysis of some recent data. I have a repeated measures design. 220 students were presented with 13 different problem scenarios and then had to indicate who they would seek help from, ranking a list of seven help providers (ie...
  20. M

    repeated measures factorial ANOVA post hoc test

    Currently I am working on a way to distinguish Delirious patients from patients who still suffer from anesthesia and controls. I use the EEG and calculate relative powers in four frequency bands (Delta, Theta, Alpha and Beta) in three different regions (Anterior, Central and Posterior) of the...