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26 results for “from:Antoine Tremblay”

poly() or rcs()?
Antoine Tremblay · Nov 13, 2009 · r-sig-mixed-models

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R-sig-mixed-models Digest, Vol 35, Issue 9
Antoine Tremblay · Nov 11, 2009 · r-sig-mixed-models

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Including by-item random intercepts for generalizability. Also to model (potential) heteroscedasticity?
Antoine Tremblay · Nov 10, 2009 · r-sig-mixed-models

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Including by-item random intercepts for generalizability. Also to model (potential) heteroscedasticity?
Antoine Tremblay · Nov 10, 2009 · r-sig-mixed-models

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Including by-item random intercepts for generalizability. Also to model (potential) heteroscedasticity?
Antoine Tremblay · Nov 10, 2009 · r-sig-mixed-models

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plotting 3-way interactions
Antoine Tremblay · Oct 22, 2009 · r-sig-mixed-models

Hello all, It appears that the plotLMER.fnc function from languageR library cannot plot 3-way interactions (for an LMER model naturally).?Is there any way to plot them? Your help is well appreciated, -- Antoine Tremblay Department of Neuroscience Georgetown...

follow-up (posthoc) analyses from an LMER model
Antoine Tremblay · Oct 21, 2009 · r-sig-mixed-models

Hi everyone, I'm wondering how to do follow-ups for an LMER model (e.g., Y ~ A * B + (1|Subject) + (1|Item) ) If you fit a model using the function aov(), naturally without the random effects terms, you can...

Should I include Items as a random effect?
Antoine Tremblay · Dec 7, 2009 · r-sig-mixed-models

Dear all, I am unsure whether I should include Items as a random effect in my model. I have an experiment in which all of the items were created and I'm analyzing a substantial subset of the full set...

The effects of adding by-subject or by-item random intercepts
Antoine Tremblay · Dec 7, 2009 · r-sig-mixed-models

Dear all, This question is about the effects of adding by-subject or by-item random intercepts to a model. If we are contrasting a single condition between two subject groups, say ReactionTime ~ Sex, is it warranted (or necessary or...

looping with multiple response variables lme4
Antoine Tremblay · Apr 7, 2012 · r-sig-mixed-models

Hi Justus, Maybe the following functions from package "LMERConvenienceFunctions" can be of help: bfFixefLMER_F.fnc Back-fits an LMER model on p-values from ANOVA and, optionally, on LLRT. bfFixefLMER_t.fnc Back-fits an LMER model on absolute...

Any package for best subset selection for, random effects model
Antoine Tremblay · Feb 13, 2012 · r-sig-mixed-models

Maybe function ffRanefLMER.fnc from package LMERConvenienceFunctions??? Antoine Tremblay, PhD NeuroCognitive Imaging Laboratory Dalhousie University Halifax, NS B3H 3J5, Canada Tel.: (902) 494-1911 eom On 12-02-13 04:30 PM, r-sig-mixed-models-request at r-project...

poly() and rcs()?
Antoine Tremblay · Nov 15, 2009 · r-sig-mixed-models

Dear all, Here is a question regarding the difference between using poly() and rcs(). If you fit a model using poly(), as shown below, the summary returns statistics for the term "linear" term, poly(TrialContinuous,2,raw=TRUE)1, and...

lme or lmer?
Antoine Tremblay · Jan 21, 2012 · r-sig-mixed-models

Hey Giorgio! I have one published paper in JoCN where we analyzed ERP data using LMER, another one is on the way, and a methods paper is almost finished and submitted to NeuroImage regarding the addition of by-item random...

lme or lmer?
Antoine Tremblay · Jan 21, 2012 · r-sig-mixed-models

Hey Giorgio! I have one published paper in JoCN where we analyzed ERP data using LMER, another one is on the way, and a methods paper is almost finished and submitted to NeuroImage regarding the addition of by-item random...

R-sig-mixed-models Digest, Vol 70, Issue 19
Antoine Tremblay · Oct 14, 2012 · r-sig-mixed-models

No problem :-) Antoine Tremblay, PhD NeuroCognitive Imaging Laboratory Dalhousie University Halifax, NS B3H 4R2, Canada Tel.: (902) 494-1911 eom On Fri 12 Oct 2012 07:00:01 AM ADT, r-sig-mixed-models-request at r-project.org wrote...

Interactions and posthocs for LMER models
Antoine Tremblay · Oct 20, 2009 · r-sig-mixed-models

Hello all, here's a question about interactions. Let's just say you have the variables Diagnosis with two levels LI (language impaired) and N (normals) and FreqGroup with two levels High and Low. Then you have the following linear...

R-sig-mixed-models Digest, Vol 70, Issue 19
Antoine Tremblay · Oct 14, 2012 · r-sig-mixed-models

Oops! :-( I don't know how this was sent to the R mailing list??? Sorry Antoine Tremblay, PhD NeuroCognitive Imaging Laboratory Dalhousie University Halifax, NS B3H 4R2, Canada Tel.: (902) 494-1911 eom On Fri 12 Oct 2012 07:00...

Convergence check in lmer()
Antoine Tremblay · Feb 5, 2010 · r-sig-mixed-models

Dear David, You could do something like create a log file where you would redirect the warnings and error messages and then check the logs to see if a particular model converged or not. For instance: options(warn=1) wngs...

To conjoin or not to conjoin factorial variables?
Antoine Tremblay · Oct 18, 2009 · r-sig-mixed-models

Hello all, We are interested in an interaction between FACTOR A (levels "a" and "b"), FACTOR B (levels "c" and "d") and variable TIME (which we model with a 5 knot restricted cubic spline). That is: m1= lmer(LogRT~A...

R-sig-mixed-models Digest, Vol 70, Issue 19
Antoine Tremblay · Oct 14, 2012 · r-sig-mixed-models

Would Monday at 2:30--3:30-ish and Tuesday at 12:30--1:30-ish work? Antoine Tremblay, PhD NeuroCognitive Imaging Laboratory Dalhousie University Halifax, NS B3H 4R2, Canada Tel.: (902) 494-1911 eom On Fri 12 Oct 2012...

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