In the 1950s psychiatrist Cathy Hayes raised a young chimp in her own home. In late infancy Viki, the chimp, began to trail an arm behind her as if pulling a toy on a string, and would even pretend to catch the string on obstructions and then release it again. After several weeks of this behaviour, Viki one day appeared to entangle the imaginary toy around the knob of the toilet, and cried for help. Hayes pantomimed untangling the rope and returning it to her, to be rewarded with what could have been either "a look of sheer devotion" or "just a good hard stare". A few days later, when Hayes decided to invent a make-believe pull-toy of her own that clacked on the floor and swooshed on the carpet, "Viki stared at the point on the floor when the imaginary rope would have met the imaginary toy, uttered a terrified "oo-oo-oo," leap into Cathy's arms, and never played the game again.
- excerpt from "On the origins of Stories"
by Brian Boyd.
The Belknap Press of Harvard University Press.
ISBN 978-0-674-03357-3
