# Tagged Questions

This tag is too generic. Please consider using multilevel-analysis, mixed-model, or hierarchical-bayesian tags instead.

138 views

### Multilevel bayesian with AR1 correlation structure

How do I fit a bayesian multilevel model with with AR(1) correlation structure? I am trying to teach myself bayesian modelling and I am wondering how you could specify a multilevel model with an ...
69 views

### Hierarchical regression with partially nested variables

I would like to do a logistic regression of vaccination coverage of, for example, $HPV$. Let's assume that we have 50 states ($S$). 30 states have an urban part and a country part (urbanity variable ...
53 views

### Multilevel model by two step estimation

Consider the simple multilevel model \begin{align} Y_{ij} &= X_{ij} B + u_{ij}, \\ B &= Z_{j}R + e_{j}. \\ \end{align} What happens if firstly the parameters vector $B$ is estimated by ...
78 views

### Modeling spatial correlations with multilevel data

I have ~5M records of spatial polar coordinates (r and theta). These 5M records are from 400 different 'locations' that I have ~150 variables for (no NAs). I also have 1 binary variable used to flag ...
53 views

### Is multilevel analysis with aggregation terms the best approach for this situation?

My research model has two levels of dependent variable, at the organizational level and a predictor variable at individual level. I have 500 answers from 5 middle managers (in each firm) in 100 firms ...
262 views

### How to check and correct heteroskedasticity in a multilevel model?

I've conducted an experiment in which we have registered a physiological measure (FR) of 30 participants in two different conditions. In each condition, I registered the measure in 20 time points, ...
218 views

### Fixed effects contrasts in multilevel model

I'have fitted a mixed model in SPSS with fixed and random effects, and I would like to know what do the Fixed effects contrasts (type III) mean... In my model they are significant (e.g F=23.9; ...
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### Include lower level (2-way and 3-way) interactions in 3-level multilevel model?

I have a three level multilevel model (therapists, patients, repeated measures) in which I have included 4-way interactions, for instance: therapist self-efficacy * treatment condition * patient on ...
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### Group-level dependent variable and within-group interdependent events (Mplus?)

Here is a minimum viable example that resembles my problem: Subjects are human individuals Subjects are characterized by a set of categorical and continuous variables Subjects engage in a varying ...
71 views

### how to assess multilevel model assumptions using residual plots

I am not clear as to how to assess if a multilevel model fit using lmer satisfies the assumptions of Normality and Homoscedasticity? I have used the following r code and i find that histogram of ...
60 views

### How can one perform a multilevel ANOVA in R?

I want to apply a multilevel analysis of variance, using Bayesian framework (as was proposed by Gelman, 2005). I wish to identify the main factors to be used together in a GAM model. In this case, ...
39 views

### What is the difference between multilevel modeling and three factor nested mixed ANOVA

I have time nested in students, nested in teachers. How would this look in a three factor set up A x B x C? time = 3 occasions students = randomly assigned to four conditions teachers = 20 any ...
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### Multilevel time series vs. multilevel n-1 vs. case series design

I am carrying out a pilot intervention study with no placebo (so intervention only) with about 5-10 participants. Now I am wondering what will be the best statistical technique to use: multilevel ...
59 views

### Variance explained in multilevel model - why based on covariance parameters & not information criteria (-2LL)?

In logistic regression, using Hosmer Lemeshow's approach, the effect size or variance explained is the amount of reduction in -2LL of the developed model (which equals the chi square statistic of the ...
41 views

### Interpreting interactions in multilevel model

I'm running a rather simple multilevel model in which I have two variables interacting at level 1. The interaction term is significant, but I'm not sure how to interpret it properly. I am familiar ...
120 views

### Multilevel, repeated measures with mediators and moderators in R

I'm having difficulty running analyses on my dataset, and was hoping someone could help. Here's the rundown (NOTE: the performance DV is the only DV strictly at the group level) Approximately 85 ...
As described in Merlo et al (J Epidem Comm Health 2006), the 95% credible interval for MOR is calculated using MCMC. MOR is defined as $\exp(\sqrt{2\sigma^2}\times 0.675)$, where $\sigma$ is the ...