I thought of the same film, and in the film (if I remember correctly) the John Nash character in the end even uses the same strategy to deal with the hallucinat

I thought of the same film, and in the film (if I remember correctly) the John Nash character in the end even uses the same strategy to deal with the hallucinations. To paraphrase, he says something like, he sees them but he knows they are not real, and choses not to listen. (Oh, and of course, am not saying this is the only strategy for dealing with psychosis, but it is just that it was also the first thing that came to mind when I read this article:)