Ape versus machine: Do primates enjoy computer games?

A chimp genius can complete a computer memory test in less time than it takes the average person to blink - and much faster than any human rival. But do the world's cleverest animals enjoy these cognitive tasks?

Ayumu's daily routine resembles that of many 11-year-olds: sleep, eat, play and learn.

During his "study sessions" he receives a treat every time he correctly remembers the location of the numbers on screen and selects them in order.

"Research suggests that in terms of animal welfare, it's more important for tasks to be motivating and 'functional' rather than looking natural."