Waitsang Keung

This paper uses a drift diffusion model to show that older adults have higher decision thresholds, which may compensate for lower signal-to-noise ratios, leading to reduced random exploration.

The paper introduces a divisive normalization model for evidence accumulation, showing it matches human perceptual decision-making as well as the Drift Diffusion Model.

This study investigates suboptimalities in perceptual decision making and their relationship with pupil-linked arousal processes, finding that different suboptimalities correlate with distinct aspects of pupil response.

The paper shows how task context and cognitive control modulate semantic representations in the brain, using fMRI and behavioral data.