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Dale und sein Team interessierte dabei, wie sich die Bewegungscharakteristika veränderten, wenn Menschen lernen. Dazu ließen sie die Teilnehmer ihnen anfangs nicht vertraute Symbole zu Paaren ordnen. Dabei fanden sie heraus, dass der Lernerfolg der Teilnehmer sich auch körperlich niederschlug: Je vertrauter die Probanden mit ihrer Aufgabe wurden, desto schneller, regelmäßiger und fester wurden ihre Bewegungen.

That ranges from Habbos creating their own  pretend shops to IMVU's emphasis on user-created content--Rosenzweig says that almost 100% of its 1.6 million items are user-created, seeing its top ten developers raking in $100,000 over the last year--to Three Rings' Whirled, which encourages users to build their own games from the ground up. The big question, of course, is how to monetize that content. In IMVU, said  Rosenzweig, creators "do what they do because it's cool, but they like making credits" by selling the items in world. That can then be cashed out through IMVU, which leads to 90% of its revenue, taking a cut while transfering IMVU credits to real world dollars. That user attitude is true of Dogster and Catster as well--users don't get a cut of the money generated by creating games around their items and boosting activity. They just enjoy creating and sharing. For Whirled, Three Rings is still experimenting with its business model for sharing and creating content.

Researchers at Osaka University are stepping up efforts to develop robotic body parts controlled by thought, by placing electrode sheets directly on the surface of the brain.

"The virtual world provides the body," said Dr Ben Goertzel, founder and head of Novamente.

"We have a pretty fully functioning animal brain right now and we are hooking it up to the different virtual worlds,"

"I'd really like to do virtual talking parrots," he said, "and then virtual babies.