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Poster Session C: Friday, August 15, 2:00 – 5:00 pm, de Brug & E‑Hall

Computational Models of Dual System Reasoning

Zoe Purcell¹, Wim De Neys, Kobe Desender²; ¹Université Paris Cité, ²KU Leuven

Presenter: Zoe Purcell

Dual system theories propose that human reasoning arises from two interacting systems: a fast, automatic process (System 1) and a slower, deliberative process (System 2; Kahneman, 2011; De Neys, 2022). Despite their influence across domains, including economics and moral psychology, these accounts remain largely verbal and underspecified. Existing computational models of reasoning tend to be narrow in scope, lack rigorous fitting, and inadequately capture interactions between System 1 and System 2—particularly how and when deliberative processes are triggered. We develop six computational models formalizing dual system assumptions, including mechanisms such as inhibition and metacognitive monitoring. Preliminary results suggest that intuitive and deliberative reasoning may rely on similar underlying processes.

Topic Area: Predictive Processing & Cognitive Control

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