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Robert Long

Leeds, United Kingdom

https://www.linkedin.com/in/roblongleeds/

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Top Questions
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341
Crossed vs nested random effects: how do they differ and how are they specified correctly in lme4?
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174
What is an ablation study? And is there a systematic way to perform it?
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86
What is "restricted maximum likelihood" and when should it be used?
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78
How do DAGs help to reduce bias in causal inference?
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51
Dealing with singular fit in mixed models
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40
Sample size calculation for mixed models
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33
Why are Chinese mountains scaled by steps? (instead of winding paths)
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33
How do the number of imputations & the maximum iterations affect accuracy in multiple imputation?
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31
Is this causation?
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29
Minimum sample size per cluster in a random effect model
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25
What is the best programmatic way for determining whether two variables are linearly or non-linearly or not even related
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24
Overfitting in Linear Regression
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23
Propensity score matching after multiple imputation
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22
Why is this linear mixed model singular?
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20
Variable selection in logistic regression model
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19
What are the worst (commonly adopted) ideas/principles in statistics?
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18
Multiple Membership vs Crossed Random Effects
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17
Use of ICC in multilevel modelling
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17
Should "City" be a fixed or a random effect variable?
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17
Can you please explain Simpson's paradox with equations, instead of contingency tables?
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17
How to simplify a singular random structure when reported correlations are not near +1/-1
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15
glmer vs lmer, what is best for a binomial outcome?
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15
Calculating $R^2$ in mixed models using Nakagawa & Schielzeth's (2013) R2glmm method
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14
Can we remove significant variables in a regression?
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14
should I use na.omit or na.exclude in a linear model (in R)?
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14
Why this simple mixed model fail to converge?
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14
Training a neural network on chess data
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14
Repeated measures analysis: why nest experimental factors within subject factor?
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13
Paired t-test with multiple observations per pair
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13
Does it make sense for a fixed effect to be nested within a random one, or how to code repeated measures in R (aov and lmer)?
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