Statistical Analysis Stack Exchange
Statistical Analysis Stack Exchange

Questions tagged [crossed-random-effects]

Crossed random effects refers to 2+ sets of random effects where levels of 1 random effect can occur in multiple levels of another. Eg, students in classrooms are nested, but students reading different stories could be crossed.

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Crossed vs nested random effects: how do they differ and how are they specified correctly in lme4?

Here is how I have understood nested vs. crossed random effects: Nested random effects occur when a lower level factor appears only within a particular level of an upper level factor. For example, pupils within classes at a fixed point in time.…
Joe King
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lme4 - correct formula for a crossed factor nested mixed model

I am having a little trouble verifying correct notation for a crossed factor nested mixed model anova using lme4 package in R. My data is experimental, I applied two crossed treatments (light and nutrients) and measured growth of algal cultures, and…
Rose
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Bootstrapping with more than one random effect

Consider an experiment with $m$ subjects and $n$ words. Every subject rates every word, producing an $(m \times n)$ data matrix $\hat{X}$. I am interested in forming a confidence interval around $f(\hat{X})$ where $f$ is some arbitrary scalar…
Trisoloriansunscreen
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Lmer model syntax for a combination of crossed and nested random effects

I'm trying to use the lmer() function in R to specify a particular random effects structure for a model that has four levels: each measurement on a students occurs in one or more groups, and each group occurs in one of several districts. The…
user2363777
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Interpreting nested random effects

I was playing around with some data and had hard time to understand the meaning of nested effects. Here's an example of a dataset (selfesteem2 from package datarium) dat <- structure(list(id = structure(c(1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L,…
User33268
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crossed random effects with autoregression, glmmTMB

I am working on data that have crossed random effects as well as a autoregressive covariance structure. I would like to check if there is something unlogical about my approach, as the model I would like to fit produces problems in the Hessian. I am…
Peter
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Equation notation for crossed-effect mixed models

I have conducted a crossed-effect logistic regression using Stata's meqrlogit command and have been asked to provide the equation notation. I have participants (ID) who each rated 8 activities (act) and I am looking at the impact of 3 independent…
James
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How to build a GLMM that observes the years since experimental design was established?

Hello, my first question, quite individual, so I find it difficult to relate already answered questions to mine. I have observed the vegetation development in forests of 5 different areas (area) in an experimental experiment. The design can be…
Ole Herbchandler
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How to fit the right cross-classified multilevel model

. I would like to study the link between mortality (outcome and binary variable) and competition between hospitals (Predictor). The competition faced by the hospital is measured by the Herfindahl-Hirschmann index (HHI), which is a continuous…
Seydou GORO
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How do I specify crossed random intercepts in lme?

I want to run a random intercept mixed-effect model, with two random intercepts. I made some example data below, which consists of 10 subjects from 3 families that go to 3 different schools. They get two types of training, that I want to include as…
Abdel
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Negative binomial regression analysis with crossed random effects

I face a challenge in running a model comprising (1) crossed random effects and (2) a zero-inflated negative binomial regression in R. In the study, I analyze interactions between organizations. Specifically, I check how often x dyads of…
Lea
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Linear Mixed Model With Partially Crossed Random Effects

I am trying to apply a linear mixed model on my data. Unfortunately all howto's and papers I found yet do not help me with my design: I have 30 different texts (stimuli) which are rated on 5 items (on the text quality) by the participants. Every…
HenrikG
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Crossed effects in lmer or lme4

I conducted an experiment where I want to predict response times in a picture classification task from person characteristics (age, prior experience) and item characteristics (similarity; color, shape, background). All participants saw all items and…
achmed
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Crossed or nested random effects in a repeated measures and a between-subject design?

After reading a lot of material on nested and crossed effects, I am still unsure on whether the random effects in my design are nested or crossed. I would really appreciate advice from some more seasoned linear mixed model users! Design: Two…
Bronte McKeown
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Singular fit for a mixed-effects model with crossed design

I have a dataset where different features were measured for three conditions. Each feature consists of sub-features, and sub-features are nested within features. I'm interested in the contrasts cond1 vs ctrl and cond2 vs ctrl on the feature level.…
Frederik Ziebell
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