Event-Related Potentials 🧠

5-Minute Research Update

Dr. Cheng-Han Yu
Department of Mathematical and Statistical Sciences
Marquette University

3/3/23

Electroencephalography (EEG)

Source: https://en.wikipedia.org/wiki/Electroencephalography

The raw EEG can indicate general state, e.g., awake or asleep, but it can’t tell us much about specific neural processes that underlie perception, cognition or emotion.

EEG to Event-Related Potentials (ERP)

Source: ERP Boot Camp (Luck and Kappenman, 2020)

Event-Related Potentials (ERP)

Source: Luck (2012)

:: notes To pull out the brain’s consist response to some type of event, we can simply average across the epochs for that event type. When we average across enough epochs, any activity that’s consistent from trial to trial remains in the average, and any random noise simply averages out. :::

What ERP Can Do

Source: ERP Boot Camp (Luck and Kappenman, 2020)

Estimate ERP Components

• We are interested in estimating the amplitude and latency of some ERP component.

Source: Rossion & Jacques (2012)

Learning Models and Algorithms

• Current methods
  • require lots of averaging
  • no uncertainty quantification

Solve the issues by

• Bayesian hierarchical model with derivative Gaussian process prior with Monte Carlo EM algorithm
  • Yu et al., Biometrics (2022)
  • Li et al., Journal of American Statistical Association, Theory and Methods (2023)
  • Yu et al., Biostatistics (2023 expected)

Other Projects

Other projects you could work with me:

• Bayesian spatiotemporal modeling of complex-valued fMRI
• Bayesian neural networks for image classification
• Bayesian high-dimensional spatial regression for online streaming data
• Bayesian analysis on game-based STEM learning