Dreams of Doom help gamers learn

Sigmund Freud thought dreams were a window into our unfulfilled sexual desires. But the dreams of video game players suggest they have a more practical role: helping us to learn new skills.

"It really looks like if you're not dreaming about it, you're not getting better," says Robert Stickgold of Harvard Medical School, who carried out one of the video game studies.

The studies don't prove that dreaming about games makes players better. But they strongly suggest that dreaming and learning are intertwined.

That sleep can help with learning and memory is well established. What's more, the more people dream during the light sleep characterised by rapid eye movements (REM), the better they recall memories. But whether the specific content of dreams plays a role in this sleep-learning process wasn't clear.

To find out, Sidarta Ribeiro and André Pantoja of the Edmond and Lily Safra International Institute of Neuroscience of Natal in Brazil turned to the visceral, monster-filled, first-person shoot-'em-up game Doom.