|
Activity Number:
|
35
|
|
Type:
|
Contributed
|
|
Date/Time:
|
Sunday, August 2, 2009 : 2:00 PM to 3:50 PM
|
|
Sponsor:
|
Section on Statistics and the Environment
|
| Abstract - #304698 |
|
Title:
|
Analyzing Ecological Momentary Assessment Data: Variation Among Subjects in Baseline Event Rates
|
|
Author(s):
|
Benjamin Neustifter*+ and Stephen L. Rathbun and Saul Shiffman
|
|
Companies:
|
The University of Georgia and The University of Georgia and University of Pittsburgh
|
|
Address:
|
167 Fawn Drive, Athens, GA, 30605,
|
|
Keywords:
|
Ecological Momentary Assessment ; Poisson processes ; Survival analysis ; Temporal data ; Random effects
|
|
Abstract:
|
Ecological Momentary Assessment (EMA) is an emerging method of data collection that is focused upon obtaining information about events as they occur naturally in a subject's environment. Previous works use inhomogenous Poisson processes to model events based on time-varying covariates but assume identical baseline rates of event occurrence among subjects. In this talk, we present methods for modeling random variation in baseline rates. The talk will include a review of inhomogenous Poisson processes and EMA, an overview of the estimation of the coefficient estimators under the proposed model, a discussion of their asymptotic properties, and illustrate results using data from an EMA study of smoking.
|
