[ABE-L] SEMINÁRIO: PPG em Estatística - UnB

[Antonio Eduardo Gomes]

O PROGRAMA DE PÓS-GRADUAÇÃO EM ESTATÍSTICA CONVIDA PARA: 

SEMINÁRIO: 

“TIME SERIES AND MULTILEVEL MODELING FOR LONGITUDINAL ITEM RESPONSE
THEORY DATA” 

PALESTRANTE: 

Prof. Caio Lucidius Naberezny Azevedo (Unicamp) 

DATA: 26/06/2018 _(terça-feira)_ 

HORÁRIO: 14:30h 

LOCAL: Sala Multiuso (A1-7/76) 

RESUMO 

Longitudinal Item Response Theory (IRT) data occurs when experimental
units are submitted to measurement instruments (e.g., cognitive test,
psychiatric questionaires, biological essays among others) along
different assessment conditions, as different time points. Very often,
in this kind of study, we are interested in the so-called latent
variables (or latent traits) and their behavior along these conditions,
including the modeling of their inter-dependency structure. In this work
we use some stationay and nonstationary time series and multilevel
models to represent longitudinal IRT data. More specifically, we
consider first order auto-regressive (AR(1)), first order moving average
(MA(1), first order auto-regressive- moving average (ARMA(1,1)) time
series models as well as the Uniform and Hankel dependency structures,
induced by appropriate multilevel models. These structures are studied
under a time-homocedastic and time-heteroscedastic fashions. We
developed a Bayesian inference framework, which includes parameter
estimation, model fit assessment and model comparison, through MCMC
algorithms. Simulation studies are conducted in order to measure the
parameter recovery and model comparson tools. A real data analysis,
concerning a longitudinal cognitive study for Mathmatics achievement,
conducted by the Federal Brazilian government, is performed. All
computational implementations are made through the WinBUGS program,
using the R2WinBUGS package, from R program. 

 VEJA OS PRÓXIMOS SEMINÁRIOS: HTTP://WWW.PGEST.UNB.BR/SEMINARIOS  

__________________________________________________________________________________________________________

Programa de Pós-Graduação em Estatística
Universidade de Brasília
www.pgest.unb.br [1]
Telefone: (61) 3107-3697 

Links:
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[1] http://www.pgest.unb.br
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