# repeated

1. ### Sound propagation modeling (with lme, unequal sample size, and "drop out" problems?)

I conducted a sound propagation experiment in which 20 different recorded roar-barks (the long distance vocalization of maned wolves) were played back at different sites(x3), hours(x6: 17h,18h,23h,05h,06h,11h), and with different speaker position (x2: straight forward and inclined upward 45o)...
2. ### Sample difference in repeated designs with control

Hi everyone, as my computer crashed a few days ago, I lost the source to an article I was reading referring to how large the sample size deviation in repeated measures can be between treatment and control group. If I remember correctly it cited Stevens (might have been Student though) on how...
3. ### Which test to compare two curves

I have used a stimulus (stimulus1) in a perception test, to see if the participants perceive it as A or B in a forced choice task. (the stimulus is composed of several features f1,f2...) Then I have changed one of the features (f1) of stimulus1 gradually in 5 different levels. All...
4. ### Repeated measures with unequal intervals

When analyzing within-group measures (or within-between 'mixed' ANOVA), how do we handle repeated measures that have been collected at unequal intervals? For instance, data (such as weight, cholesterol, hemoglobin) was collected at baseline, 1 hour later, 3 days later, 2 months later, and one...
5. ### Polynomial interaction in a mixed-design ANOVA

My analysis includes a between-group factors (condition [control vs. experimental]) and several within-subjects continuous factors (cholesterol, glucose, mass). The within-subjects factors were measured, for both groups, once a month over 5 months. I'm interested in seeing whether there was a...
6. ### Array problem

Hello all! :wave: Thanks for any help you might have. I've got a dataset with repeated measures for each medical ICD-9 code, and I need to make it such that the data is one row per person. For example (this isn't actually my data): What I have now: Kelly 745.5 Kelly 747.0...
7. ### HOW do I insert a baseline covariate in repeated GLM?

Am I doing something wrong? Using repeated GLM. Two groups, experiment and control. Dependent is a score on a scale. Data (the same score on the scale) are collected pre intervention and two post-tests. I am going to use the pre-test scores as a covariate to correct for possible...
8. ### hierarchical random effects structure in GLIMMIX

Hi All, I have a question about complicated random effects structures. Please bear with me. I am trying to construct a model in GLIMMIX that has a spatially hierarchical (i.e. nested), repeated measures random effects structure. The problem is how to correctly account for a random observer...