An experimental design used in situations where one factor can be changed more easily than another one. It's also called "mixed design" because it involves between-subject (hard to change) and within-subject (aka repeated measures; easy to change) factors.
Questions tagged [split-plot]
82 questions
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Split-Plot ANOVA: model comparison tests in R
How can I test effects in a Split-Plot ANOVA using suitable model comparisons for use with the X and M arguments of anova.mlm() in R? I'm familiar with ?anova.mlm and Dalgaard (2007)[1]. Unfortunately it only brushes Split-Plot Designs. Doing this…
caracal
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Omega squared for measure of effect in R?
The statistics book I am reading recommends omega squared to measure the effects of my experiments. I have already proven using a split plot design (mix of within-subjects and between-subjects design) that my within-subjects factors are…
levesque
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Split-split-plot design and lme
I’m working on a data set in order to evaluate the impact of drying on sediment microbial activities. The objective is to determine if the impact of drying varies among sediment types and/or depth within the sediment.
The experimental design is as…
John Smith
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Is a "split plot" ANOVA with two factors the same as two-way ANOVA with repeated measures in one factor?
Is a "split plot" ANOVA with two factors identical to two-way ANOVA with repeated measures in one factor? if not, what is the distinction?
Harvey Motulsky
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Understanding the split plot
Can someone explain me the intuition behind the split plot?
From what I understand, it is essentially restricted randomization. But I still do not quite understand it. Is there a resource or example anyone can give me to make it clearer?
phil12
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Nested/SplitModel - RepeatedMeasures/MixedModel ANOVA: levels of nesting & scripting in R
My data set has the following variables:
Treatment (4 types- fixed)
Location (8 locations- fixed)
Position in Location (3 positions per location- fixed)
Samples are taken in each position (3 samples per position-random)
Time (two sampling times -…
Lorain
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Split plot in R
I have a data set of $n$ benchmarks and $m$ subsamples in each benchmark. I run these benchmarks and their subsamples on $p$ subject machines.
The 'individual' studied by the subsamples are the same for each subject machine, and the benchmarks are…
Alex Brown
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What is the specific issue with using count data for ANOVA tests
I'm running a study with a between-groups component and a within-groups component, with a predictor that is count data. I was planning on using split-plot ANOVA to analyze this, but after seeing lots of questions on here, it is commonly said that…
cjfcjf
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Mixed-design with split-plot and mixed effect
From Wikipedia:
a mixed-design analysis of variance model (also known as a split-plot ANOVA) is used to test for differences between two or more independent groups whilst subjecting participants to repeated measures. Thus, in a mixed-design ANOVA…
Tim
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How can I treat blocks in a split plot design?
In a field experiment involving crops, what is the difference in considering block as random or otherwise as fixed factor?
As far as I understood, random means that conclusion can be extended to other levels not included in the study; fixed factor…
user2779
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Cohen's d in split-plot experiments
There is some demand for effect-size measures in doing post hoc analyses, and I am trying to decide whether to provide for this or not in an R package of mine. If I do, I would concentrate on Cohen's $d$-style measures, which in the context of…
Russ Lenth
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How to choose between nested or split-plot analysis of variance?
I am having serious problems understanding the type of design I have, I would appreciate any help you can give me to understand it:
I have 324 data points, and four factors:
epoch factor, with three levels.
altitudinal floor factor, with three…
Juan
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Mixed-design ANOVA or one-way ANOVA with delta values
I have an experiment with one independent variable with 4 levels (4 different treatments) and 1 dependent variable which was measured twice - before and after the treatment (repeated measures).
I think there are at least two ways to analyze…
Florian
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Can I test the effect of Block in a split plot design in R?
I have been confused with the problem for a very long time, and hope that somebody here can help me out.
I have a experiment installed in split-plot design, with 3 temporal groups as blocks, and 2 factors (each have 3 fixed levels) combinations in…
Marco
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A curious clinical trial design - What is the type / name of this rare methodology?
There is this split-mouth randomized clinical trial, in which one side of the mouth receives a particular treatment, and the other side receives another treatment (usually used as the control treatment); (we do this after randomization of the…
Vic
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