Neural Substrates of Duration Serial Dependence: Opposing Modulation in Basal Ganglia and Posterior Medial Cortex

Perceptual judgments are systematically biased toward recent experience, a phenomenon called serial dependence. The brain circuits underlying this effect in time perception remain unknown. Using fMRI, we identified the neural substrates of duration serial dependence and tested whether they overlap with those for motion direction. Twenty-seven participants reproduced either the duration or direction of a visual stimulus; a retro-cue revealed which feature to report 3-s after stimulus onset, separating memory-trace signals from task-switching signals. Duration serial dependence was robust and roughly four times stronger on task-repeat than task-switch trials; direction serial dependence was ne