I put myself forward as a test subject, spending 40 minutes in a quiet room going through the various examinations. If you've ever played Brain Age / Dr. Kawashima's Brain Training on the Nintendo DS, you'll be familiar with the territory here. If you're not, then it's a series of 12 cognition tests, ranging from remembering a list of words to drawing a picture from memory. There are also more advance examinations, such as the Iowa Gambling Task through to spotting someone's perceived emotion from a still image of their face.

The test is reasonably simple to complete and to do so in the comfortable surroundings of your own home helps. The instructions are unthreatening and, on the most part, easy to understand, although a bug in the app robbed me of my practice run for one of the sections. As a tool to make general conclusions in a quick, easy and cheap manner for mental health professionals, it seems like something of a no brainer. Just be warned: if you don't have a psychological condition that needs attention, don't be offended if you get called average.