HGF Toolbox v4.0

Version 4.0 of the HGF Toolbox has been released.

The HGF Toolbox implements many variants of the hierarchical Gaussian filter (HGF) and many other models used in time-series modeling, such as hidden Markov models, hierarchical hidden Markov Models, Rescorla-Wagner, etc.

The main highlights of this release are

– the new PDF documentation,

– the new interactive demo, and

– the greater ease of configuration.

Configuration is now easier because of the replacement of the parameter theta in the HGF models by its log-transformed equivalent, omega_n, where n is the number of levels in the model. This parameter is estimated . . . → Read More: HGF Toolbox v4.0

HGF Toolbox v2.1

Version 2.1 of the HGF Toolbox has been released.

The HGF Toolbox implements the hierarchical Gaussian filter (HGF) introduced in

Mathys C, Daunizeau J, Friston KJ, Stephan KE (2011). A Bayesian foundation for individual learning under uncertainty. Front. Hum. Neurosci. 5:39. doi: 10.3389/fnhum.2011.00039

After downloading, unzip and read the introduction in the README file.

This release introduces Bayesian parameter averaging and contains bugfixes.

The most important bug concerns the calculation of the negative free energy F, which dropped constant terms in the log-joint for estimation purposes without adding them back in. This does not affect parameter and . . . → Read More: HGF Toolbox v2.1

Dr. Andreea Diaconescu

Post-doctoral Fellow, Translational Neuromodeling Unit (TNU),  Institute for Biomedical Engineering, University of Zürich & ETH Zürich Biography

Andreea Diaconescu obtained her PhD at the Rotman Research Institute affiliated with University of Toronto under the supervision of Dr. Randy McIntosh. During her graduate training, Andreea examined the temporal dynamics of multisensory processes and how auditory-visual interactions change with age using electro- and magneto-encephalography. Andreea has also collaborated with Shitij Kapur (Institute of Psychiatry, King’s College London) and Gwenn Smith (Johns Hopkins Bayview Medical Center), investigating pharmacological models of psychiatric disorders, including . . . → Read More: Dr. Andreea Diaconescu