repeated measure

  1. B

    F test significant but simple contrasts not

    Hi All, I have conducted a repeated measures ANOVA, examining one of my dependent variables over 5 time points. I have a significant main effect from my F test but not when i am examining my simple contrasts (see images below). Could anyone offer any advice on why this is and what should be...
  2. M

    modeling ratio between test response and control response in a repeated measures design

    Hello everyone ! I am currently struggling with the analysis of a repeated measures model. Data are organized as follow: Each subject has received a particular vaccine. The blood of each subject is then tested with different viruses. Three quantitative measures are made for each couple...
  3. W

    Clustering univariate measures

    Hello, I'd like some guidance, since I don't know exactly what statistic would be more adequate in my case. I have a dataset that includes several categories and only one relevant numerical variable, and each category is repeated and has several measurements. I have around 1500 data points...
  4. T

    How to controll for practice effects in a repeated within-subjects design?

    Hey there, I'm currently conducting a pharmacological memory task that is designed as a repeated double-blinded within-subjects experiment. Participants have to perform the same memory task (but different stimuli) on two days (minimum break of 6 days). I was expecting practice effects (=...
  5. D

    Evaluate multiple repeated measurements (lots of measurements)

    In my research, in which I examined the change in blood pressure according to the treatments applied (2 treatment groups, 1 control group), I obtained 180 measurements for each individual (33 participants were found in each group) in a total of 2 months. How should I go about evaluating these...
  6. E

    SPSS Analysis for Pre-test & post-test, control group design

    Hi, I am running an analysis for a experimental study and would like to get some opinions about the most appropriate method. I have two groups: control (no treatment) and experimental groups (intervention) I test all individuals before the experiment and after (pretest-posttest) I collect 10...
  7. A

    Nonparametric Friedman test - repeated measures and repeated subjects

    Hi all, I would appreciate some advice on the most appropriate nonparametric test to evaluate the impact on some measures when subsampling my original datasets. Number of subjects: 9 Number of original datasets: 14 (some subjects have multiple sessions; 3 subjects have 2 sessions; 1 subject has...
  8. O

    Advice on repeated measures ANOVA vs multi-level model

    Hello! I have a situation that I have never encountered before, but I think I know what the issue is. Nevertheless, I could use some assistance. I ran an experimental study with a within-subjects design. Subjects learned words under 4 different conditions (A,B,C,D), 30 words in each condition...
  9. N

    Which ANOVA? Or series of independent samples t-tests?

    Hello everyone, I am looking at how native speakers (NS) and non-native speakers (NNS) use lexical repetition in argumentative essays. I would like to compare the mean frequency and density of lexical repetition between the two groups. And also examine whether a participant's use of lexical...
  10. D

    Problem with repeated-measures GLMM in SPSS for psycholinguistic study: Failure to converge

    I'm trying to run a generalized linear mixed model in SPSS, with a continuous response variable (ResponseTime), SubjectID as a random factor, Items as a repeated measure, and five fixed factors: three categorical subject variables (Sex, Handedness, Familial Handedness) and two categorical item...
  11. K

    Comparison Between Three Groups Over Time

    Which statistical test should I use to compare between three groups over time (28 days) using means calculated for the whole group?
  12. B

    [ANOVA in R] Which ANOVA to run?

    Dear forum members, I have been looking for a solution that fits my analysis both on this forum and the web and have returned empty handed so decided to post my own thread. For my Master's thesis, we have performed an experiment with 160 plants from 10 different genotypes, divided in 2...
  13. M

    Repeated measures to predict binary outcome

    I would like to predict outcome of an event based on repeated measures. The problem is the following one: I have 100 patients with measures of a certain feature at different times, but all the patients do not have the same number of measures. The test data has been taken before knowing the...
  14. O

    How to Analyze Multi-wave Data with No Groups and "Treatment" Applied Then Removed

    I have a data set with 3 waves of data, and the final N=110. There are NO groups – i.e. everyone in the study does the exact same thing. Participants complete a survey at all 3 waves. At Survey 1 (S1) I collected a variety of baseline measures (Baseline Var A, Baseline Var B, etc.). At all 3...
  15. souha2018

    Herarchical three-level (Multilevel) generalized linear logistic regression repeated measure with nesting/crossing using glmer in R

    I have been trying to find out the most adequate glmer formula for my data but I found no example that reflects my specific structure as illustrated above. My data is dichotomous [correct/incorrect (0,1)] for vocabulary tests: So here is what I have: Subjects Response as DV Time...
  16. B

    How to build a binomial mixed model?

    I have data whose structure is seen in the image below. You see one participant's responses in the second row. M1-4 through F3-6 are trials in which a binary response was made (participant chose one of two stimuli presented on the screen). These were M(ale) and F(emale) stimuli. 1 through...
  17. R

    Comparing quantitative parameter between two groups with only one of these having repeated measures

    My question regards the best way of comparing two groups for differences in the levels of several quantitative parameters. Here, for only one of the groups there are 4 repeated measurements at different intervals. The data -We have two groups we want to compare: one consists of ~200 patients at...
  18. P

    Chi-square test for a binary outcome and beyond

    Hello Everyone, I'm quite concerned about the applicability of some non-parametric tests in the following example because it is adapted from a defended doctoral dissertation, yet there are (as I understand) technical flaws. My questions follow the example. It is a within-subject design with...
  19. D

    Kappa for binary repeated measures

    Hi! I have two raters (patient and physician) who rate the a condition at several visits. I would like to account for inter-individual correlation when I estimate kappa. And I want to assess of there is a trend in kappa. For continuous data, the the cccrm package (R) could work. I´m unsure...
  20. S

    Nested within-subjects repeated measures stats?

    Hi people, I am having some confusion over how to carry out the stats for my experiment. In the experiment, there is two condition of teaching method "prof-generated" and "student-generated" and the DV is students' quiz scores over 4 quizzes. As I carried out the experiment in a real...