Drift Diffusion Model Basics in R

I’m learning about drift diffusion models to understand how people make decisions. Starting from basic concepts and working my way up. These are my personal study notes and experiments.

Tutorials

1. Introduction to Random Walks – The foundation of evidence accumulation
2. Simulating the Diffusion Model – Core DDM simulation and parameters
3. Parameter Variability – Across-trial variability in DDM parameters
4. Exploring DDM Parameters – Systematic parameter exploration
5. Mathematical Foundations – The math behind the DDM
6. Quantile-Probability Plots – Advanced visualization of RT distributions

Other

• Journal Club Tutorial – From random walks to the full model
• Interactive Demo – Explore DDM parameters in real-time

Resources

• Forstmann, B. U., & Turner, B. M. (Eds.). (2024). An Introduction to Model-Based Cognitive Neuroscience. Springer.
• Smith, P. L., & Ratcliff, R. (2024). An Introduction to the Diffusion Model of Decision-Making.
• Ratcliff, R., Smith, P. L., Brown, S. D., & McKoon, G. (2016). Diffusion Decision Model: Current Issues and History. Trends in Cognitive Sciences, 20(4), 260–281.