Jan Peters

Individual Differences in Dopaminergic Modulation of Exploration-Exploitation Behaviour

This study investigates how dopamine levels affect exploration-exploitation behavior in humans, finding that cognitive capacity and sex moderate L-DOPA effects on decision-making.

Catecholamine Precursor Modulation of Human Exploration:Evidence From a Large Gender-Balanced Sample

This study shows that Tyrosine supplementation improves reinforcement learning by stabilizing choice behavior and increasing value-driven exploitation in a gender-balanced sample.

Urban green space exposure reduces subjective stress and physiological arousal

This study shows that exposure to urban green spaces reduces subjective stress and physiological arousal compared to gray spaces during naturalistic walking.

Recurrent Neural Network Exploration Strategies During Reinforcement Learning Depend on Network Capacity

This study examines how RNN capacity affects exploration strategies in reinforcement learning, finding that higher capacity networks exhibit more human-like strategies but still differ in perseveration and switch rates.

Dopamine and temporal discounting: revisiting pharmacology and individual differences

The paper re-examines the pharmacological effects of L-DOPA on temporal discounting in a large sample and evaluates proxy measures for dopamine, finding a reliable reduction in discount rate with no credible effects from proxy measures.

Ghrelin and risky decision-making: No credible evidence for homeostatic state modulation of neural or behavioural effects

This study investigates whether ghrelin modulates risky decision-making through homeostatic state changes but finds no credible effects on behavior or neural activity.

Ambulatory physiological measures obtained under naturalistic urban mobility conditions have acceptable reliability

This study assesses the reliability of ambulatory physiological measures during urban walking, finding acceptable test-retest reliability for compound scores derived from cardiovascular and electrodermal activity.

Reduced Model-Based Control in Gambling Disorder Despite Intact Neural Value and Task Structure Representations

This study investigates reduced model-based control in gambling disorder using reinforcement learning tasks, computational modeling, and fMRI, finding intact neural representations of task structure despite behavioral impairments.

Signatures of heuristic-based directed exploration in two-step sequential decision task behaviour.

The paper extends a hybrid RL model with a heuristic-based exploration mechanism to analyze two-step sequential decision tasks, finding it better explains choice probabilities in stage one.

Pharmacological enhancement of dopamine neurotransmission does not affect illusory pattern perception

This study investigates whether dopamine manipulation affects illusory pattern perception in healthy individuals, finding no significant effect of L-DOPA on false alarm rates or other measures.

Exploration-exploitation mechanisms in recurrent neural networks and human learners in restless bandit problems

This study compares human and recurrent neural network performance in restless bandit tasks, finding human-level RNN performance and distinct exploration strategies.

A meta reinforcement learning account of behavioral adaptation to volatility in recurrent neural networks

The paper shows that recurrent neural networks trained with medium or meta-volatility regimes adapt better to environmental volatility than those trained in low volatility.

Chronic deep brain stimulation of the human nucleus accumbens region disrupts the stability of inter-temporal preferences.

This study shows that chronic deep brain stimulation of the nucleus accumbens disrupts long-term stability of inter-temporal preferences in OCD patients.

Erotic cue exposure increases physiological arousal, biases choices towards immediate rewards and attenuates model-based reinforcement learning

The paper examines how erotic cues affect physiological arousal, reward discounting, and model-based reinforcement learning in healthy males.

Appetitive cue exposure increases neural reward responses without modulating temporal discounting

The paper examines how exposure to appetitive cues affects temporal discounting and neural reward responses in humans, finding no significant effect on discounting despite increased neural activity.

Dopamine regulates decision thresholds in human reinforcement learning.

This study investigates dopamine's role in human reinforcement learning using pharmacological interventions and fMRI, finding reduced decision thresholds under dopaminergic manipulations.

Motor response vigour and fixations reflect subjective preferences during intertemporal choice

The paper examines how motor response vigour and eye movements correlate with subjective value during intertemporal choice, finding that higher rewards are discounted less and are associated with stronger responses.

Parameter and model recovery of reinforcement learning models for restless bandit problems

The paper evaluates parameter and model recovery of the Kalman SMEP reinforcement learning model in restless bandit tasks using simulation and Bayesian inference.

A single dose of the catecholamine precursor Tyrosine reduces physiological arousal and decreases decision thresholds in reinforcement learning and temporal discounting

This study examines the effects of a single dose of tyrosine on decision-making tasks and physiological arousal, finding reduced response times and altered temporal discounting.

Trial-wise exposure to visual appetitive cues increases physiological arousal but not temporal discounting.

The paper tests how exposure to appetitive, aversive, and neutral visual cues affects temporal discounting and physiological arousal in humans, finding no significant increase in discounting despite increased arousal.

Gambling environment exposure increases temporal discounting but improves model-based control in regular slot-machine gamblers.

Increased temporal discounting and reduced model-based control in problem gambling are not substantially modulated by exposure to virtual gambling environments.

This study examines the effects of virtual gambling environments on problem gamblers and controls, finding increased physiological arousal but no substantial behavioral or physiological changes beyond craving.

Incidental reinstatement of faces and scenes in medial temporal lobe subregions during word recognition

The paper shows that high-confident word recognition in humans incurs incidental reinstatement of associated face and scene representations in medial temporal lobe subregions, even without explicit retrieval instructions.

Temporal discounting in adolescents and adults with Tourette syndrome

This study investigates temporal discounting in adolescents and adults with Tourette syndrome, finding reduced impulsive choice in adolescents but no differences in adults.

Reliability assessment of temporal discounting measures in virtual reality environments

This study assesses the reliability of temporal discounting tasks in VR environments, finding good to excellent reliability for discount rate parameters but mixed results for other measures.

Attenuated directed exploration during reinforcement learning in gambling disorder

This study finds that gamblers show reduced strategic exploration during reinforcement learning, linked to altered fronto-parietal network activity and potential dopamine system changes.

Dopaminergic modulation of human inter-temporal choice: a diffusion model analysis using the D2-receptor-antagonist haloperidol.

This study uses a diffusion model to analyze how haloperidol affects temporal discounting and decision-making in humans, finding reduced discounting and faster response times.

Decomposition of reinforcement learning deficits in disordered gambling via drift diffusion modeling and functional magnetic resonance imaging.

This study uses drift diffusion modeling and fMRI to identify computational mechanisms of reinforcement learning deficits in gambling disorder, finding reduced boundary separation and drift rate effects in the gambling group.

Dopaminergic modulation of the exploration/exploitation trade-off in human decision-making

This study investigates how dopamine affects the exploration-exploitation trade-off in human decision-making using computational modeling, pharmacology, and fMRI.

The drift diffusion model as the choice rule in inter-temporal and risky choice: a case study in medial orbitofrontal cortex lesion patients and controls.

The paper applies the drift diffusion model to inter-temporal and risky choice tasks, showing that vmPFC/mOFC lesions affect decision-making parameters but not value sensitivity.