Research Seminar
A hierarchical latent Ornstein-Uhlenbeck stochastic model for describing changes in the core affect spaceZita Oravecz & Francis TuerlinckxKU Leuven | |
| Abstract: | In the presentation we will claim that a stochastic model, namely the Ornstein-Uhlenbeck process, is an appealing approach to explore changes in the individual’s core affect. Core affect is a compound of hedonic and arousal values, which are assumed to change continuously over time. In the presented model, an Ornstein-Uhlenbeck process governs the core affect changes on a latent level. The observed core affect position is a measurement error corrupted of the true core affect position. The changes will be described in terms of stochastic model parameters, which are: homebase, intra-individual variability and centralizing tendency. With a hierarchical extension, we will be able to explore inter-individual differences with respect to these parameters. Furthermore, with the help of covariate information, these differences can be studied in many respects. Time-varying covariate information (i.e. time of the day) will also be included in the model. As an illustration, an application on a dataset collected in a diary study will also be presented. |
| Date: | Tue Apr 8, 12:15 pm - 1:15 pm |
| Place: | room 00.60 (Department of Psychology, Tiensestraat 102, 3000 Leuven) |