190 What is the difference between fixed effect, random effect and mixed effect models? 2010-11-19T00:03:28.163

112 R's lmer cheat sheet 2011-07-17T21:50:47.643

72 How to choose nlme or lme4 R library for mixed effects models? 2010-12-10T09:31:14.580

72 How scared should we be about convergence warnings in lme4 2014-07-30T15:02:41.120

58 What is "restricted maximum likelihood" and when should it be used? 2013-01-28T08:05:17.363

52 Unified view on shrinkage: what is the relation (if any) between Stein's paradox, ridge regression, and random effects in mixed models? 2014-10-30T15:08:26.507

49 Questions about how random effects are specified in lmer 2012-07-03T13:58:54.663

47 When to use generalized estimating equations vs. mixed effects models? 2011-10-03T09:25:41.297

43 How exactly does a "random effects model" in econometrics relate to mixed models outside of econometrics? 2016-10-03T16:09:50.403

41 How to obtain the p-value (check significance) of an effect in a lme4 mixed model? 2012-02-16T19:02:04.460

41 Crossed vs nested random effects: how do they differ and how are they specified correctly in lme4? 2016-08-08T15:08:39.020

35 Under what conditions should one use multilevel/hierarchical analysis? 2010-08-22T00:22:33.757

32 Using lmer for repeated-measures linear mixed-effect model 2013-05-11T21:44:08.007

31 Negative values for AICc (corrected Akaike Information Criterion) 2010-07-22T10:11:15.210

31 Variance on the sum of predicted values from a mixed effect model on a timeseries 2011-05-18T14:59:03.320

30 What are easy to interpret, goodness of fit measures for linear mixed effects models? 2012-09-25T07:35:53.793

29 How do I fit a multilevel model for over-dispersed poisson outcomes? 2011-02-08T13:02:55.313

29 What is compound symmetry in plain english? 2011-09-02T08:42:39.257

29 Difference between generalized linear models & generalized linear mixed models 2012-07-16T23:47:32.463

27 Multiple comparisons on a mixed effects model 2010-12-08T11:22:42.240

27 Computing repeatability of effects from an lmer model 2011-09-19T18:01:57.400

27 lme and lmer comparison 2013-07-13T13:27:20.377

27 How trustworthy are the confidence intervals for lmer objects through effects package? 2014-10-02T16:44:48.267

26 How can I test whether a random effect is significant? 2013-04-15T12:37:39.043

26 Prediction interval for lmer() mixed effects model in R 2015-04-22T21:42:06.527

25 Example reports for mixed-model analysis using lmer in biology, psychology and medicine? 2012-04-20T21:55:18.190

25 What does the anova() command do with a lmer model object? 2013-10-04T14:05:22.683

25 When are zero-correlation mixed models theoretically sound? 2016-04-07T05:10:02.133

24 Mixed Effects Model with Nesting 2013-12-11T16:48:08.407

23 What is the mathematical difference between random- and fixed-effects? 2012-04-10T21:39:04.850

23 In a multi-level model, what are the practical implications of estimating versus not-estimating random effect correlation parameters? 2013-02-12T15:42:06.620

23 Negative values for AIC in General Mixed Model 2014-02-01T12:14:46.577

22 Why do lme and aov return different results for repeated measures ANOVA in R? 2011-08-10T15:16:03.890

22 How to interpret variance and correlation of random effects in a mixed-effects model? 2012-03-10T21:30:19.950

22 What is the upside of treating a factor as random in a mixed model? 2014-08-14T18:20:37.657

21 Formula symbols for mixed model using lme4 2011-11-15T18:28:04.347

21 Residual diagnostics in MCMC -based regression models 2012-06-11T13:46:33.007

21 How to test and avoid multicollinearity in mixed linear model? 2014-01-22T06:24:38.680

21 How to get an "overall" p-value and effect size for a categorical factor in a mixed model (lme4)? 2014-04-24T15:35:24.527

21 Showing that 100 measurements for 5 subjects provide much less information than 5 measurements for 100 subjects 2017-07-30T18:17:28.477

20 How should mixed effects models be compared and or validated? 2012-02-28T03:33:59.977

20 Have I correctly specified my model in lmer? 2013-09-20T00:34:23.250

20 How to apply binomial GLMM (glmer) to percentages rather than yes-no counts? 2014-02-26T12:36:44.943

19 What is the minimum recommended number of groups for a random effects factor? 2012-09-20T01:56:50.007

19 Checking assumptions lmer/lme mixed models in R 2013-11-27T20:21:50.110

19 Satterthwaite vs. Kenward-Roger approximations for the degrees of freedom in mixed models 2014-07-16T13:30:53.737

19 Why do the estimated values from a Best Linear Unbiased Predictor (BLUP) differ from a Best Linear Unbiased Estimator (BLUE)? 2014-10-31T18:36:32.377

18 How to combine confidence intervals for a variance component of a mixed-effects model when using multiple imputation 2010-09-13T11:47:27.230

18 Using lmer for prediction 2010-11-04T03:08:14.567

18 What is the difference between generalized estimating equations and GLMM? 2011-10-20T18:52:51.307

18 predict() Function for lmer Mixed Effects Models 2015-09-25T19:47:23.673

18 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)? 2016-08-28T01:21:07.773

17 How to interpret main effects when the interaction effect is not significant? 2012-06-24T13:06:16.500

17 How can I pool posterior means and credible intervals after multiple imputation? 2012-08-03T07:05:12.967

17 Interpreting three forms of a "mixed model" 2012-10-01T09:55:13.813

17 How does a Poisson distribution work when modeling continuous data and does it result in information loss? 2012-10-03T03:38:30.350

17 Independence of residuals in a computer-based experiment/simulation? 2012-10-15T16:14:48.897

17 Big disagreement in the slope estimate when groups are treated as random vs. fixed in a mixed model 2013-04-20T19:50:13.660

17 How do I interpret the 'correlations of fixed effects' in my glmer output? 2013-04-25T15:46:10.870

16 Pitfalls of linear mixed models 2010-12-12T21:53:35.743

16 How should standard errors for mixed effects model estimates be calculated? 2011-07-25T08:43:32.087

16 Repeated measures ANOVA with lme in R for two within-subject factors 2011-08-03T04:54:47.900

16 Allowed comparisons of mixed effects models 2011-09-24T16:49:07.967

16 In practice how is the random effects covariance matrix calculated in a mixed effects model? 2011-11-29T06:02:31.240

16 Beta regression of proportion data including 1 and 0 2013-01-18T16:58:39.563

16 Standard error of random effects in R (lme4) vs Stata (xtmixed) 2013-01-22T14:49:09.557

16 Sample size calculation for mixed models 2013-01-23T20:44:41.107

16 Clustered standard errors vs. multilevel modeling? 2013-06-03T19:21:00.543

16 How to choose random- and fixed-effects structure in linear mixed models? 2014-12-30T12:57:23.500

16 Cheat Sheet ANOVA Alphabet Soup & Regression Equivalents 2015-08-23T20:45:07.433

16 Are mixed models useful as predictive models? 2016-12-07T21:51:40.303

15 Unbalanced mixed effect ANOVA for repeated measures 2010-10-22T05:03:26.650

15 How to analyze longitudinal count data: accounting for temporal autocorrelation in GLMM? 2012-01-05T05:50:06.337

15 When is a repeated measures ANOVA preferred over a mixed-effects model? 2012-03-08T11:06:18.237

15 Variance-covariance matrix in lmer 2013-02-11T21:51:10.003

15 What would be an illustrative picture for linear mixed models? 2013-03-02T12:09:04.077

15 Comparing non nested models with AIC 2014-09-26T22:14:03.793

14 Follow up: In a mixed within-between ANOVA plot estimated SEs or actual SEs? 2010-08-24T10:05:42.533

14 Comparing mixed effect models with the same number of degrees of freedom 2010-10-08T12:34:11.673

14 What are R-structure G-structure in a glmm? 2012-07-25T11:31:38.167

14 Concepts behind fixed/random effects models 2012-08-09T13:01:50.033

14 Random effect equal to 0 in generalized linear mixed model 2012-08-23T19:19:24.337

14 Mixed model vs. Pooling Standard Errors for Multi-site Studies - Why is a Mixed Model So Much More Efficient? 2012-08-31T07:00:48.173

14 Visualizing mixed model results 2012-10-04T01:35:51.430

14 Proper bootstrapping technique for clustered data? 2012-11-08T21:41:50.897

14 Why do I get zero variance of a random effect in my mixed model, despite some variation in the data? 2014-09-11T10:07:40.273

14 Fixed effect vs random effect when all possibilities are included in a mixed effects model 2014-10-21T19:01:40.570

13 Linear Mixed Effects Models 2010-07-27T11:29:20.193

13 What is the difference between using aov() and lme() in analyzing a longitudinal dataset? 2011-02-14T06:46:27.827

13 Proportion of explained variance in a mixed-effects model 2011-02-15T09:11:10.857

13 What are the differences between "Mixed Effects Modelling" and "Latent Growth Modelling"? 2011-04-26T12:33:47.493

13 Estimating the break point in a broken stick / piecewise linear model with random effects in R [code and output included] 2011-12-13T17:15:09.543

13 How to test the effect of a grouping variable with a non-linear model? 2012-04-17T08:20:55.717

13 Variance partitioning and longitudinal changes in correlation with binary data 2012-06-07T14:07:05.437

13 Is this an acceptable way to analyse mixed effect models with lme4 in R? 2013-07-05T15:57:50.847

13 Why can't I match glmer (family=binomial) output with manual implementation of Gauss-Newton algorithm? 2013-11-22T01:57:54.973

13 Why does one have to use REML (instead of ML) for choosing among nested var-covar models? 2014-05-24T05:04:09.827

13 Invalid inference when observations are not independent 2014-09-27T15:48:18.740

13 Why do mixed effects models resolve dependency? 2015-04-03T09:25:07.310