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Sengupta, Biswa, Friston, Karl J and Penny, Will D. 
ORCID: https://orcid.org/0000-0001-9064-1191
(2015)
Gradient-free MCMC methods for dynamic causal modelling.
NeuroImage, 112.
pp. 375-381.
ISSN 1053-8119
Abstract
In this technical note we compare the performance of four gradient-free MCMC samplers (random walk Metropolis sampling, slice-sampling, adaptive MCMC sampling and population-based MCMC sampling with tempering) in terms of the number of independent samples they can produce per unit computational time. For the Bayesian inversion of a single-node neural mass model, both adaptive and population-based samplers are more efficient compared with random walk Metropolis sampler or slice-sampling; yet adaptive MCMC sampling is more promising in terms of compute time. Slice-sampling yields the highest number of independent samples from the target density - albeit at almost 1000% increase in computational time, in comparison to the most efficient algorithm (i.e., the adaptive MCMC sampler).
| Item Type: | Article |
|---|---|
| Additional Information: | Copyright © 2015 The Authors. Published by Elsevier Inc. All rights reserved. |
| Uncontrolled Keywords: | algorithms,bayes theorem,humans,computer-assisted image processing,markov chains,neurological models,monte carlo method,software,walking |
| Faculty \ School: | Faculty of Social Sciences > School of Psychology |
| Depositing User: | Pure Connector |
| Date Deposited: | 19 Aug 2017 05:06 |
| Last Modified: | 21 Oct 2022 15:30 |
| URI: | https://ueaeprints.uea.ac.uk/id/eprint/64580 |
| DOI: | 10.1016/j.neuroimage.2015.03.008 |
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