Ketamine is perhaps best known for being a popular recreational drug.
A clinical trial using an antibiotic to treat autism is ongoing in California.
The Montreal Cognitive Assessment asks people to draw a cube, remember five words and repeat sentences exactly.
Researchers from UCLA examined how people react when the death of others is at stake.
The Capgras delusion was first reported in 1923, and scientists are now edging closer to understand this extremely rare condition.
Our correspondent went along to the sixth annual Hearing Voices Congress to meet the people talking back.
The patient spent 18 hours a day wearing the glasses, removing them only to sleep and bathe.
A paper reporting the discovery of 108 genetic links to schizophrenia is published on the same day that Ted Stanley donates $650 million to fund psychiatric research.