Introductory BayesiaLab Course — October 30 – November 1, 2023

Three-Day Introductory BayesiaLab Course

The Graduate Cincinnati, 151 Goodman Drive, Cincinnati, Ohio 45219 October 30 – November 1, 2023
Since 2009, our BayesiaLab courses and events have spanned the globe. From New York to Sydney, Paris to Singapore, we've touched down in cities worldwide (take a peek at our photo gallery!).
After pausing our in-person training due to COVID, we're ecstatic to announce its return in 2023 at The Graduate Cincinnati. Located at the heart of the vibrant University of Cincinnati campus, this former Marriott Kingsgate Conference Center has been transformed with an 'upscale funky' vibe. And this hip location will roll out the red carpet for the 2023 BayesiaLab Fall Conference right after our course concludes.
The Introductory BayesiaLab Course is more than just a beginner's guide. It's a deep dive into applying Bayesian networks across diverse fields, from marketing science and econometrics to ecology and sociology. And we don't just stick to theory. Every conceptual lesson transitions seamlessly into hands-on practice with BayesiaLab, allowing you to directly apply what you've learned, be it in knowledge modeling, causal inference, machine learning, or more.
Over 1,500 researchers worldwide can vouch for its impact, many of whom have made Bayesian networks and BayesiaLab integral to their research. Don't just take our word for it - check out the testimonials!

Register Here

Course Program

Day 1: Theoretical Introduction
Day 2: Machine Learning — Part 1
Day 3: Machine Learning — Part 2


  • Bayesian Networks: Artificial Intelligence for Decision Support under Uncertainty
  • Probabilistic Expert System
  • A Map of Analytic Modeling and Reasoning
  • Bayesian Networks and Cognitive Science
  • Unstructured and Structured Particles Describing the Domain
  • Expert Based Modeling and/or Machine Learning
  • Predictive vs. Explanatory Models, i.e., Association vs. Causation
  • Application Examples: Medical Expert Systems, Stock Market Analysis, Microarray Analysis, Consumer Segmentation, Drivers Analysis, and Product Optimization

Examples of Probabilistic Reasoning

  • Cognitive Science: How Our Probabilistic Brain Uses Priors in the Interpretation of Images
  • Interpreting Results of Medical Tests
  • Kahneman & Tversky’s Yellow Cab/White Cab Example
  • The Monty Hall Problem, Solving a Vexing Puzzle with a Bayesian Network
  • Simpson’s Paradox - Observational Inference vs. Causal Inference

Probability Theory

  • Probabilistic Axioms
  • Interpretation with Particles
  • Joint Probability Distribution (JPD)
  • Probabilistic Expert System for Decision Support: Types of Requests
  • Leveraging Independence Properties
  • Product/Chain Rule for Compact Representation of JPD

Bayesian Networks

  • Qualitative Part: Directed Acyclic Graph
  • Graph Terminology
  • Graphical Properties
  • D-Separation
  • Markov Blanket
  • Quantitative Part: Marginal and Conditional Probability Distributions
  • Exact and Approximate Inference in Bayesian networks
  • Example of Probabilistic Inference: Alarm System

Building Bayesian Networks Manually

  • Expert-Based Modeling via Brainstorming
  • Why Expert-Based Modeling?
  • Value of Expert-Based Modeling
  • Structural Modeling: Bottom-Up and Top-Down Approaches
  • Parametric Modeling
  • Cognitive Biases
  • BEKEE: Bayesia Expert Knowledge Elicitation Environment

Parameter Estimation

  • Maximum Likelihood Estimation
  • Bayesian Parameter Estimation with Dirichlet Priors
  • Smooth Probability Estimation (Laplacian Correction)

Information Theory

  • Information is a Measurable Quantity: Log-Loss
  • Expected Log-Loss
  • Entropy
  • Conditional Entropy
  • Mutual Information
  • Symmetric Relative Mutual Information
  • Kullback-Leibler Divergence

Unsupervised Structural Learning

  • Entropy Optimization
  • Minimum Description Length (MDL) Score
  • Structural Coefficient
  • Minimum Size of Data Set
  • Search Spaces
  • Search Strategies
  • Learning Algorithms
    • Maximum Weight Spanning Tree
    • Taboo Search
    • EQ
    • TabooEQ
    • SopLEQ
    • Taboo Order
  • Data Perturbation
  • Example: Exploring the relationships in Body Dimensions
    • Data Import (Typing, Discretization)
    • Definition of Classes
    • Exclusion of a Node
    • Heuristic Search Algorithms
    • Data Perturbation (Learning, Bootstrap)
    • Choice of the Structural Coefficient
    • Console
    • Symmetric Layout
    • Analysis of the Model (Arc Force, Node Force, Pearson Coefficient)
    • Dictionary of Node Positions
    • Adding a Background Image

Supervised Learning

  • Learning Algorithms
    • Naive
    • Augmented Naive
    • Manual Augmented Naive
    • Tree-Augmented Naive
    • Sons & Spouses
    • Markov Blanket
    • Augmented Markov Blanket
    • Minimal Augmented Markov Blanket
  • Variable Selection with Markov Blanket
  • Example: Predictions based on body dimensions
    • Data Import (Data Type, Supervised Discretization)
    • Heuristic Search Algorithms
    • Target Evaluation (In-Sample, Out-of-Sample: K-Fold, Test Set)
    • Smoothed Probability Estimation
    • Analysis of the Model (Monitors, Mapping, Target Report, Target Posterior Probabilities, Target Interpretation Tree)
    • Evidence Scenario File
    • Automatic Evidence-Setting
    • Adaptive Questionnaire
    • Batch Labeling

Semi-Supervised Learning—Variable Clustering

  • Algorithms
  • Example: S&P 500 Analysis
    • Variable Clustering
      • Changing the number of Clusters
      • Dynamic Dendrogram
      • Dynamic Mapping
      • Manual Modification of Clusters
      • Manual Creation of Clusters
    • Semi-Supervised Learning
    • Search Tool (Nodes, Arcs, Monitors, Actions)

Data Clustering

  • Synthesis of a Latent Variable
  • Expectation-Maximization Algorithm
  • Ordered Numerical Values
  • Cluster Purity
  • Cluster Mapping
  • Log-Loss and Entropy of the Data
  • Contingency Table Fit
  • Hypercube Cells per State
  • Example: Segmentation of men based on body dimensions
    • Data Clustering (Equal Frequency Discretization, Meta-Clustering)
    • Quality Metrics (Purity, Log-Loss, Contingency Table Fit)
    • Posterior Mean Analysis (Mean, Delta-Means, Radar Charts)
    • Mapping
    • Cluster Interpretation with Target Dynamic Profile
    • Cluster Interpretation with Target Optimization Tree
    • Projection of the Cluster on Other Variables

Probabilistic Structural Equation Models

  • PSEM Workflow
    • Unsupervised Structural Learning
    • Variable Clustering
    • Multiple Clustering for Creating a Factor Variable (via Data Clustering) per Cluster of Manifest Variables
    • Unsupervised Learning for Representing the Relationships Between the Factors and the Target Variables
  • Example: The French Market of Perfumes
    • Cross-Validation of the Clusters of Variables
    • Displayed Classes
    • Total Effects
    • Direct Effects
    • Direct Effect Contributions
    • Tornado Analysis
    • Taboo, EQ, TabooEQ, and Arc Constraints
    • Multi-Quadrants
    • Export Variations
    • Target Optimization with Dynamic Profile
    • Target Optimization with Tree

About the Instructor

  • Dr. Lionel Jouffe is co-founder and CEO of France-based Bayesia S.A.S. Lionel holds a Ph.D. in Computer Science from the University of Rennes and has worked in Artificial Intelligence since the early 1990s. While working as a Professor/Researcher at ESIEA, Lionel started exploring the potential of Bayesian networks.
  • After co-founding Bayesia in 2001, he and his team have been working full-time on the development BayesiaLab, which has since emerged as the leading software package for knowledge discovery, data mining, and knowledge modeling using Bayesian networks. BayesiaLab enjoys broad acceptance in academic communities, business, and industry.

Who should attend?

Applied researchers, statisticians, data scientists, data miners, decision scientists, biologists, ecologists, environmental scientists, epidemiologists, predictive modelers, econometricians, economists, market researchers, knowledge managers, marketing scientists, operations researchers, social scientists, students and teachers in related fields.

What's required?

  • Basic data manipulation skills, e.g., with Excel.
  • No prior knowledge of Bayesian networks is required.
  • No programming skills are required. You will use the graphical user interface of BayesiaLab for all exercises.
  • For a general overview of this field of study, we suggest you read our free e-book, Bayesian Networks & BayesiaLab. Although not mandatory, reading its first three chapters would be an excellent preparation for the course.

2023 BayesiaLab Fall Conference

The Introductory BayesiaLab Course is part of the pre-conference program right before the start of the 2023 BayesiaLab Fall Conference.