Shiso, a ring-necked parakeet, can't speak English, but she knows how to make her preferences known. She has screaming fights with the dogs and cats in her household, snorts for attention and food, and perches on her human to interact with her.

A new study from the University of Toronto finds that people perceive their bodies as larger in virtual reality than in the physical world—and that effect doesn't end when the headset comes off.