Computational Psychiatry Course (CPC) Zurich 2023

In this tutorial, we will recap the theory behind the Hierarchical Gaussian Filter (HGF) and introduce the model in an accessible way. We will then discuss practical issues when fitting computational models to behavioral data in general and specific to the HGF. We will work through exercises to learn how to analyze data with the HGF using the HGF Toolbox (in Julia and Python).

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please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this tutorial, we will review the theory behind active inference and how to implement it within a partially observable Markov decision process (POMDP). We will then do exercises building generative models of common behavioral tasks, learn how to run simulations, and illustrate the useful properties of this modeling framework and when it is and isn't applicable. Finally, we will work through exercises to learn how to fit active inference models to behavioral data and use parameter estimates as individual differences measures in common computational psychiatry contexts. All tutorial exercises will be conducted in MATLAB.

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please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this tutorial, participants will learn how to use a Bayesian package called hBayesDM (supporting R and Python) for modeling various reinforcement learning and decision making (RLDM) tasks. A short overview of (hierarchical) Bayesian modeling will be also provided. Participants will also learn important steps and issues to check when reporting modeling results in publications.

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please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this hands-on tutorial, you will apply computational modelling to a real-life example. Starting from a simple experimental design (delay discounting task), you will learn how to: 

• choose and implement the right model for your task
• fit it to empirical data (and get parameter estimates)
• perform hypothesis testing using model selection
• validate your analysis using simulations and diagnostic tools

You will also learn the basics of the VBA-toolbox which contains all the tools to simulate, estimate, and diagnose your models, as well as a collection of ready-to-use models (e.g. Q-learning, DCM).

No previous experience with modelling is required, but basic knowledge of MATLAB is recommended.

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Would you like to learn more about modeling individual differences and heterogeneity in psychiatry? In this tutorial, we will abandon the classical patient vs. healthy control framework. You will be guided through how to run an analysis using normative modeling implemented in the PCNtoolkit (using cloud-hosted Python notebooks in Google Colab).

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please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

This tutorial will examine specific features of EEG data that can be used to optimize a cell and receptor specific model of brain connectivity. EEG data acquired from an event-related (ERP) visual memory study will be examined. The assumptions and parametrizations of the neural mass models will be explained. Students will learn to use the SPM graphical user interface and to write batch code in MATLAB to perform Dynamic Causal Modeling of EEG.

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please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this tutorial you will learn how to use the SPM software to perform a dynamic causal modeling (DCM) analysis in MATLAB. We will first guide you through all steps of a basic DCM analysis of a single subject: Data extraction, Model setup, Model inversion and, finally, inspection of Results. We will then proceed to look at a group of subjects. Here, we will focus on model comparison and inspection of model parameters. We will provide a point-by-point recipe on how to perform the analysis. However, it is of advantage if you have worked with neuroimaging (fMRI) data and MATLAB before. 

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please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this tutorial, you will learn how to use the regression dynamic causal modeling (rDCM) toolbox to perform effective (directed) connectivity analyses in whole-brain networks. We will provide you with the necessary theoretical background of the rDCM approach and detail practical aspects that are relevant for whole-brain connectivity analyses. After having laid the foundation, a hands-on part will familiarize you with the code and provide in-depth training on how to apply the model to empirical fMRI data. The goal of this tutorial is to familiarize you with the theoretical and practical aspects of rDCM, which will allow you to seamlessly integrate the approach into your own research. We will provide clear instructions on how to perform the analyses. However, experience with the analysis of fMRI data (already some experience with classical DCM for fMRI would be ideal) as well as experience with MATLAB are beneficial.

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The Brain Dynamics Toolbox (bdtoolbox.org) is a Matlab toolbox for simulating dynamical systems in neuroscience. It allows custom dynamical models to be explored with minimal programming effort. This is an introductory tutorial for new users. The format will be a mix of on-line lectures and self-paced exercises. Participants will be guided through the process of running an existing model and visualising the dynamics using both the graphical controls and the Matlab command line. Upon completion, participants will be able to automate a parameter sweep and produce a bifurcation diagram. No previous modelling experience is required but basic knowledge of Matlab is assumed.

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please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this tutorial, we will review the theory behind active inference and how to implement it within a partially observable Markov decision process (POMDP). We will then do exercises building generative models of common behavioral tasks, learn how to run simulations, and illustrate the useful properties of this modeling framework and when it is and isn't applicable. Finally, we will work through exercises to learn how to fit active inference models to behavioral data and use parameter estimates as individual differences measures in common computational psychiatry contexts. All tutorial exercises will be conducted in MATLAB.

Add to Calendar

please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this tutorial, participants will learn how to use a Bayesian package called hBayesDM (supporting R and Python) for modeling various reinforcement learning and decision making (RLDM) tasks. A short overview of (hierarchical) Bayesian modeling will be also provided. Participants will also learn important steps and issues to check when reporting modeling results in publications.

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In this tutorial, students will learn the theory and practice behind the drift-diffusion model, as it is usually applied to explain behavior (choice, response time, confidence) in simple decision-making tasks.

Participants will implement computational simulations to study the properties of the drift-diffusion model, and fit experimental data using MATLAB code provided by the instructor. We will also discuss some of the limitations of the model and common mistakes made when interpreting the model parameters. 

Add to Calendar

please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this hands-on tutorial, you will apply computational modelling to a real-life example. Starting from a simple experimental design (delay discounting task), you will learn how to: 

• choose and implement the right model for your task
• fit it to empirical data (and get parameter estimates)
• perform hypothesis testing using model selection
• validate your analysis using simulations and diagnostic tools

You will also learn the basics of the VBA-toolbox which contains all the tools to simulate, estimate, and diagnose your models, as well as a collection of ready-to-use models (e.g. Q-learning, DCM).

No previous experience with modelling is required, but basic knowledge of MATLAB is recommended.

Add to Calendar

please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

This tutorial will examine specific features of EEG data that can be used to optimize a cell and receptor specific model of brain connectivity. EEG data acquired from an event-related (ERP) visual memory study will be examined. The assumptions and parametrizations of the neural mass models will be explained. Students will learn to use the SPM graphical user interface and to write batch code in MATLAB to perform Dynamic Causal Modeling of EEG.

Add to Calendar

please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this tutorial you will learn how to use the SPM software to perform a dynamic causal modeling (DCM) analysis in MATLAB. We will first guide you through all steps of a basic DCM analysis of a single subject: Data extraction, Model setup, Model inversion and, finally, inspection of Results. We will then proceed to look at a group of subjects. Here, we will focus on model comparison and inspection of model parameters. We will provide a point-by-point recipe on how to perform the analysis. However, it is of advantage if you have worked with neuroimaging (fMRI) data and MATLAB before.

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In this tutorial, we will recap the theory underlying the hMeta-d model for quantifying metacognitive efficiency, our ability to monitor and evaluate our own decisions. We will introduce the model in an accessible way, then discuss practical issues when fitting computational models to behavioral data, and go through code examples relevant to computational psychiatry studies using the hMeta-d toolbox (in MATLAB).

Add to Calendar

please only book the AM or PM session of this tutorial, NOT BOTH (they are the same)

In this tutorial, you will learn how to use the regression dynamic causal modeling (rDCM) toolbox to perform effective (directed) connectivity analyses in whole-brain networks. We will provide you with the necessary theoretical background of the rDCM approach and detail practical aspects that are relevant for whole-brain connectivity analyses. After having laid the foundation, a hands-on part will familiarize you with the code and provide in-depth training on how to apply the model to empirical fMRI data. The goal of this tutorial is to familiarize you with the theoretical and practical aspects of rDCM, which will allow you to seamlessly integrate the approach into your own research. We will provide clear instructions on how to perform the analyses. However, experience with the analysis of fMRI data (already some experience with classical DCM for fMRI would be ideal) as well as experience with MATLAB are beneficial.

Add to Calendar