Psychology
Reactivation of previous decisions repulsively biases sensory encoding but attractively biases decision-making
M. Luo, H. Zhang, et al.
Using EEG and MEG in delayed-response tasks, the study reveals a two-stage “repulsive-then-attractive” mechanism of serial dependence: past-trial reports (not past stimuli) are reactivated and interact with current processing—first repelling during sensory encoding in sensory cortex and later attracting during decision-making in prefrontal cortex; the early stage is automatic while the late stage is task-modulated and predicts behavioral bias. This research was conducted by Minghao Luo, Huihui Zhang, Fang Fang, and Huan Luo.
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