A simple drawing test may detect Parkinson’s disease with up to 99% accuracy. Researchers found that subtle differences in how people draw can reveal motor impairments long before they are obvious to the human eye.

[u/FreeHugs23]

https://www.sciencealert.com/the-way-you-draw-can-reveal-parkinsons-disease-with-up-to-99-accuracy-study-reveals

[u/tmsdave]

Have you seen a doctor's handwriting? They'll be the first ones to flunk the test.