mixed anova

1. What is the correct statistical test to use?

I am creating a hypothetical study in which there are two drugs being tested. Thus I have taken 60 participants and randomly split them into three groups: drug A, drug B and a control group. A YBOCS score will be taken before the trial after the trial has ended and then again at a 3-month...
2. Mixed ANOVA - Can We Standardize After Box-Cox Transformed Values

Background: In a mixed ANOVA (2 timepoints, 3 interventiongroups, so 2x3 factorial ANOVA), the homogeneity of the residual variance was violated as indicated by significant Levene test, for the post-intervention measurement timepoint (T2) As far as I understand it, this prohibits any further...
3. Mixed model Beta distribution fit diagnostics

Hello, I have a split-plot design and I want to test the effect of 2 factors on the disease incidence (continuous proportion). I am using Beta dist. which is appropriate for these data (bounded within 0-1). The fit statistics look OK (Pearson Chi-square/DF close to 1) Fit Statistics for...
4. Is ANOVA right for me?

Hi there! So I am relatively new to the statistical side of biological data and want to know the best test for my data. The experiment was looking at the concentration of a hormone over time between two treatments with multiple replicates. something like this: Treatment A: Rep 1...
5. Coding and Visualizing Repeated Measures and Mixed-Effects Models

I am doing a study analyzing trends in changing bird diversity over the past 40 years. Surveys have been taken at 20 locations each year. The survey locations are the random effect and repeated each year. This is the code and output I used in the lme4 library...
6. SPSS Syntax with Bonferroni Correction for a Simple Effects Analysis

My stats question for my research is: I am running a 2x2x2 mixed Anova, between 2 groups, and with repeated measures for Control-trial (CI versus II) and Distractor-type (PosF versus NegF) to evaluate main effects and interactions on Accuracy. The variables used for control-trial and...
7. Power analysis for 3-way interaction with 1 between-, 2 within-subjects factors

Hi all, I am trying to use G*Power 4 to compute the sample size that I will need to detect a 3-way interaction (2 x 2 x 2) in a mixed-effect ANOVA with 2 repeated-measures factors and 1 between groups factor. Do I just add the two levels of the second repeated-measures factor to the...
8. The effect of a single continuous IV on within subjects change

Could someone please suggest the most appropriate method of analysis to examine the effect of a continuous IV on a within subject (repeated measures) DV with 2 levels (pre-post)? I have a leadership intervention where we measured "leadership style" (DV) before the program and again after the...
9. Mixed ANOVA - How to interpret and write up results

Hello everyone! I'm struggling with my first-ever data analysis using SPSS. I have conducted a mixed ANOVA using a total number of objects kept before and after an emotional prime as repeated measures and the condition (the prime - positive vs negative) as the between subjects factor. I have no...

I am struggling on which type of ANOVA to use for my work, I will provide as many details below about the study design, at the moment I am thinking mixed ANOVA but im encountering some problems which suggest that I have chosen the wrong type. I have two groups, one with a particular defect...
11. Two-way repeted measures or mixed ANOVA?

Hello, we are doing an experiment where body consistence (weight, proportion of muscles, fat, etc.) are measured. We have 103 respondents, water and banana were given to each of them a then they were measured in 5 different times (time 0, immediately after consuming water or banana, after 30...
12. Is this a case for Mixed Model Anova?

HI, My study has 2 IV's each with two levels (2 hull designs and 2 techniques) = 4 conditions, and has 3 subjects. Max acceleration data was gathered for each subject over 5 trials on the same day.Hence I have 5 x 4 values for each subject. I would like to perform ANOVA on the results without...

Hey everyone, I've been trying to confirm this for a while but I haven't been able to find a conclusive answer. I'm guessing the answer is pretty simple but I'm a bit rusty and I've looked over it so many times that I'm now a little bit saturated. Basically I am doing a project on bladder...
14. Mixed ANOVA with covariate - interpretation help!!!

Hi, I conducted the following mixed ANOVA with a covariate: 2 x groups (BS factor) 3 x Switching as repeated measures (WS factor) IQ as covariate. My output gave me the following results: in the BS-table, the effect of IQ and group x IQ was not significant. Which is good, I guess. not so...
15. Mixed ANOVA withinXbetween interaction not significant, interpret simple effects?

Hi Experts, I have conducted a 2 (time: before, after) x 3 (condition 1 2 3) mixed ANOVA. The within X between interaction is only marginally significant .06. However, simple effects indicate significant change in conditions 1 and 2. The interaction indicates if change over time is a...
16. Comparing exp and control groups in a mixed design with a comparatively small N

My study investigates the type of dialogue and behavior between children working in groups on a class activity, with and without an intervention. It is a small project with an experimental design, three experimental and three control participants (in this case each participant is a group of...
17. How to analyze parents' talk when codes are not normal in a mixed design?

This is a but tricky to explain, so I will do my best. I am trying to analyze coded talk by parents for three different categories of objects. I coded parents labeling of the three different types of objects either as standard labeling, uncertain labeling or labeling of an absent object. The...
18. mixed model anova with nested design

Hi, I need help in syntax for my current study. I am not familier that much with spss especially with syntax. Ok, this is my case. I am doing Generalizability Theory analysis using soft EduG. And one of the tabel produced is anova (attached a picture of it) It is a result of student...
19. Is this a 3-way mixed ANOVA?

I would be very grateful if you could help me: I am carrying out an experiment. I have 3 demographic groups (mothers, carers and old people). I will give them a survey BEFORE to measure their awareness of my product AND also to measure whether they can use my product successfully. Each of the...
20. Mixed ANOVA - normal distribution with heterogeneity - transformation advice

Hello, First time poster here. Any advice is appreciated: I'm doing analysis of clinical trial data using SPSS. I'm doing a mixed ANOVA looking at score differences at three points in time (baseline, middle, final) for two groups of people (Intervention, Control). N=76, intervention n=26...