[draw_down]

It appears in the book "Art & Fear: Observations On the Perils (and Rewards) of Artmaking" by David Bayles and Ted Orland.

PROTIP: Google will often tell you these things!

[ghubbard]

And where in that book are the references to an actual study?

PROTIP: Books are often filled with creative writing.

[draw_down]

Fine, OK. I checked it out and there are no citations in the book at all (1993 edition), so yes it's a just-so story.