Jonathan Paul Roiser

The paper uses intracranial recordings from patients with chronic cluster headache to show that the human VTA encodes reward-related signals during learning.

The paper investigates how anxiety affects time perception by examining neural correlates in the cingulate cortex using fMRI and temporal bisection tasks.

This study identifies four computational mechanisms underlying effort-based decision-making in depression and finds that remitted and current depressed individuals show reduced effort acceptance bias.

The paper develops a hierarchical reinforcement learning model to explain individual differences in attentional set shifting using CANTAB IED data and psychiatric symptom assessments.

This study shows that depression in Parkinson's disease is linked to reduced reward sensitivity in effort-based decision making, which is not improved by dopamine medication.

This paper develops a translational approach-avoidance reinforcement learning task to study anxiety-related avoidance, finding that higher task-induced anxiety correlates with greater punishment sensitivity and avoidance behavior.

The paper assesses the reliability of reinforcement learning and prospect theory parameters from two tasks and finds they predict future behavior reliably.

This study uses computational modeling to analyze risky decision-making in a general population sample, finding that decision parameters correlate with age and gender but not mental health symptoms.

This study investigates the acute effects of CBD on emotional processing and anxiety using neuroimaging and cognitive measures, finding no significant effects compared to placebo.

This study compares pruning behaviors in depressed and healthy individuals during multi-step decision-making but finds no group differences or relationship between pruning and depressive symptoms.

This study examines how short-term fasting affects four types of impulsivity in healthy individuals, finding impaired action inhibition and reduced reflection impulsivity during fasting.