Give someone a taller video-game avatar, and they'll negotiate more aggressively offline
Stanford researchers Nick Yee and Jeremy Bailenson found that people randomly assigned taller, more attractive avatars in a virtual environment later behaved more confidently in face-to-face tasks, even after logging off, compared to those given shorter or plainer avatars. They called it the Proteus effect: people unconsciously act out the stereotypes they believe their own appearance, even a temporary virtual one, implies about them.