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Is it possible to take the guesswork out of the prescription of medication for psychosis? Medication is available for the distressing experiences of hallucinations or delusions, but anti-psychotics only work for about three quarters of people and psychiatrists currently have no good way of working out who those people are. New research at Kings College London is trialling a type of scan that's been around for some time - a PET scan - but using it in a new way to detect whether a person's brain has an overactive dopamine system which might be able to predict which drugs will work. Claudia Hammond talks to Oliver Howes, Professor of Molecular Psychiatry, King's College London and Sameer Jauhar, Senior Research Fellow, King's College London who've been conducting this game changing research.

We hear from the latest finalist in the All in the Mind Awards - someone who knows just what it's like to struggle for many years with mental health issues and to deal with some of worst things that can happen in life. Douglas, who's had to deal with a combination of physical and mental pain, nominated his GP Jens Foell for an award in the Professional category.

What type of personality dictates whether we're prepared to stand up to someone dropping litter, chatting during a movie or more serious transgressions such as verbal abuse? It takes a certain type of person to say something, rather than to sit there and fume. So who is the most likely to stand up to anti-social behaviour? Markus Brauer, who's Professor of Social Psychology at the University of Wisconsin Madison, has been investigating just that. How did he go about it?