In schizophrenia patients with auditory hallucinations, top-down mechanism on perceptual processing could be illustrated by tasks of listening to white noise. These studies show that psychotic subjects detect more words and phrases when exposed to these stimuli. In schizophrenia patients with VHs, to our knowledge no study have explored the mechanism of false perception. Thus, we propose to experimentally manipulate the implication of Top-Down mechanisms on visual perception using an emotional priming task. This paradigm has already been used in this population to explain the mechanisms underlying productive symptoms. For example, in an emotional priming task authors have shown that a negative valence primer contributes to the implementation of an interpretive bias in a confidence judgment task.