Topic: vibrotactile frequency discrimination

Perception is molded by sensory input, prior knowledge, and contextual cues, collectively giving rise to perceptual biases whose neural mechanisms remain poorly understood. This study aimed to elucidate these mechanisms by examining prefrontal cortex (PFC) neural recordings from monkeys performing a vibrotactile frequency discrimination task (Fig. 1a). Monkey’s behavior exhibited the contraction bias (Fig. 1b), a contraction of the perceived first frequency towards its mean. This bias increased with longer delay periods, suggesting a Bayesian explanation of this effect. Examination of PFC’s ne