Contributed Talk Sessions | Poster Sessions | All Posters | Search Papers

Poster Session A: Tuesday, August 12, 1:30 – 4:30 pm, de Brug & E‑Hall

Sequence Models for By-Trial Decoding of Cognitive Strategies from Neural Data

Rick den Otter¹, Gabriel Weindel², Sjoerd Stuit, Leendert van Maanen; ¹Utrecht University, ²Université de Lausanne

Presenter: Rick den Otter

Understanding trial-by-trial variability in cognitive strate- gies during decision-making remains a challenge. We combine hidden multivariate pattern (HMP) analysis with a structured state space sequence (S4) model to decode cognitive operations from EEG data. Applied to a speed- accuracy trade-off (SAT) task, HMP identified an addi- tional Confirmation operation in accuracy-focused trials, but not in speed-focused trials. Our S4 model predicts the probability of the Confirmation operation occurring at the trial level. We use this to show that there are speed trials where the Confirmation operation does occur, and accu- racy trials where it does not. This operation correlated with higher accuracy and EMG-indexed changes of mind. The introduced method offers a new way to detect and understand cognitive strategies in a data-driven manner.

Topic Area: Predictive Processing & Cognitive Control

Extended Abstract: Full Text PDF