Abstract: The positive symptoms of psychosis – hallucinations and delusions – represent profound departures from consensual reality. They have yet to yield entirely to empirical investigation, and, whilst they are readily treated with antipsychotic drugs which block dopamine D₂ receptors, many patients do not experience symptom resolution. Furthermore, we lack a coherent account that connects the phenomenology of these symptoms (what it is like to experience them) with the mental and neural processes that underwrite them, and the social factors that form and foment them. That is the promise of computational psychiatry. It has begun to deliver, but there is substantial distance yet to cover. I will adumbrate the development of computational psychiatry approaches to delusions and hallucinations through a series of phases. I will also describe current challenges and future directions for this work. 

Recording: https://youtu.be/uSiKfB4F8IM