摘要: The prior entry hypothesis contends that attention accelerates sensory processing, shortening the time to perception. Typical observations supporting may be explained equally well by response biases, changes in decision criteria, or facilitation. In a series of experiments conducted discriminate among potential mechanisms, observers judged simultaneity temporal order two stimuli, one which was oriented exogenous, endogenous, gaze-directed, multiple exogenous cues. results suggest effects are primarily caused facilitation and attentional modifications mechanism, with only small part possibly due an attention-dependent acceleration.