时间：2026年3月26日（周四）中午 12:30
地点：清华大学吕大龙楼11层1100
报告主题 再入协调：一种塑造知觉的视觉工作记忆机制
报告人：林长涵
内容：
How does visual working memory (VWM) dynamically shape perception? Existing accounts document their covariation but lack a mechanistic explanation for how VWM representations actively modulate sensory processing. We propose and test a reentrant coordination account: perception is shaped by VWM stored in facilitated synapses via feedback from higher-order areas to primary visual cortex, where it interacts with incoming feedforward signals. Across five experiments combining psychophysics and computational modeling, we dissociated reentry load—the engagement of feedback loops—from VWM storage load by using subjective contour stimuli. Increasing reentry load reliably impaired perceptual detection, even when storage load decreased. Our model revealed reentrant feedback boosts competing responses, triggering global inhibition that suppresses detection target. This mechanism predicted that impairment would weaken over time and reverse upon removal of competition, which experiment confirmed. Our findings establish reentry load as a distinct, mechanistic source of VWM-perception interaction, providing a circuit-level account of how internal representations shape ongoing perception.
