Comment by skybrian

I don't know if he redid this independently or failed to give credit, but here is an article [1] describing some similar experiments done by Rebecca Lawson. And a formal academic paper from 2006 [2].

[1] https://www.liverpool.ac.uk/~rlawson/cycleweb.html

[2] https://link.springer.com/article/10.3758/BF03195929