Visible Gorilla?

Visible Gorilla

An article I was reading in a newspaper over the weekend spoke of the "famous 'Invisible Gorilla' experiment" as a great example of how we ignore things outside our basic interest.

I've never heard of this famous experiment, and the article never mentions it again. I could look it up, but I suspect it's a kind of trick to show I'm a fool for taking this seriously and wasting my time on it since there's no way to locate an invisible gorilla, so it's entirely outside my basic interest.