repeated measures

  1. 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...
  2. 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...
  3. 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...
  4. 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)...
  5. 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...
  6. 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...
  7. 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...
  8. 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...
  9. 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...
  10. 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...
  11. 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...
  12. 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...
  13. 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...
  14. 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...
  15. 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...
  16. M

    Repeated ANOVA controlling for a factor

    I have data for agencies funded consistently from 2003 to 2012. I have 4 agencies in Massachusetts (agencies of interests) and ## controls (other agencies). My data is in long format. I have 4 variables: Year 2204 to 2012 Total_Clients MA= controls and Massachusetts agencies (1 or 0)...
  17. S

    Combine repeated measures into single variable (dataset is already in stacked format)

    Hello, I am working with a longitudinal datasset that is already in the stacked/multiple-record/vertical format (there are six entries for each case). As it stands, there are seven separate variables that measure medication use at the seven time points. I am having a really hard time...
  18. J

    Mixed model, repeated measures, manova, nested? nominal

    Hi. I am not sure how to approach the statistical analysis of the following study. Any insights would be greatly appreciated. Thanks! So, I have two independent groups, group A and group B. I am collecting data for 3 different tasks (Task 1, Task 2, Task 3) at 3 different time points, Pre...
  19. K

    Which analysis is appropriate for our study design with multiple DV's at 3 levels?

    Our bachelor research is about distance perception in the peripersonal space. The experiment was already complex to design with the oculus rift, but the statistical analysis appears impossible :shakehead. We are trying to fit the data we gathered till now into the right analysis but we are...
  20. K

    repeated measures, 3 conditions and multiple DV's in each of the conditions

    Our experiment design is kind of complex: 35 participants, stimuli were approaching cones that disappeared at different distances (conditions: near (20 cm), mid (60 cm) and far (120 cm). The cones were seen through the oculus rift. Participants estimated the distance where the cones...