Dr Tom Hartley is a cognitive neuroscientist and Lecturer in Psychology at the University of York.
Using brain imaging and psychological tests, he investigates the workings of the human brain: how do we sense, understand and remember the world around us? How we do use this to carry out complex behaviour?
He is particularly interested in spatial memory. For example, how do we know where we are, how do we recognise places and find our way around, and why do we sometimes get lost? And what happens when our memories are damaged by disease or injury?
To understand the complexity and science behind the four mountains test, read Dr Tom Hartley's findings.