Shivam Kalhan

In 14 rats doing probabilistic reversal learning, model-derived uncertainty (unsigned average prediction error) and recency-weighted reward history distinctly and sex-specifically shaped win-stay versus lose-shift choices.

This paper introduces a salience-based model of reward prediction errors that simulates addictive behaviors, including reduced sensitivity to negative consequences and steeper delay discounting.

This study shows that people with tobacco use disorder misattribute non-drug cues as weaker predictors of positive outcomes compared to drug cues, supporting some but not all hypotheses of the salience misattribution model.

This study uses fMRI and computational modeling to show that fearful faces are perceived faster than neutral faces, involving accelerated evidence accumulation in fronto-parietal and visual areas.

This study compares neural activity during inhibitory control tasks between people with nicotine use disorder and non-smokers, finding differences in prefrontal and anterior cingulate cortex activity.