Abstract. Risk taking has often been proposed to depend on homeostatic systems. However, empirical evidence remains inconsistent, and the underlying mechanisms remain debated. Changes in risky decisio...

This study investigates the dynamic interplay between habitual and goal-directed control. Using RL and drift-diffusion modelling, we show that these systems interact in a context-dependent manner: hab...

This study shows that decision biases previously attributed to value normalization (e.g. relative value learning or range normalization) are better explained by action repetition. Repeating an action ...

Nature Human Behaviour - In this study, Collins proposes an alternative dual-process (working memory and habit) model of reinforcement learning in humans.

Risk-taking is often thought to depend on homeostatic systems. However, evidence remains mixed, and the underlying mechanisms remain debated. One candidate that might drive changes in risky decision-m...

Scripts for my master thesis "Orienting in an Uncertain World" - StevenGeysen/ScriptsThesisUncertainty

By combining whole-brain neural mass modeling with a virtual-lesioning approach informed by empirical WMH lesion masks, we provide evidence that WMH induce changes in brain dynamics by reducing the g...