[zamadatix]

As a tip: what it's really checking is for a circle centered on the dot in the middle with the radius equal to your initial click's distance from the center. You could make a mid sized perfect circle which is slightly off the center of the dot and lose to a square that fills the play area.

[pstorm]

I was wondering why some circles seemed great but got low scores. To test your tip, I just made a square and got 92%

[dxbydt]

My anticlockwise circles score more than my clockwise ones. Is there some theory behind that ?

[hinkley]

Might have something to do with the mechanics of your shoulder. Particularly if your hand is in the air, counterclockwise feels more natural than clockwise. Or at least, for your right arm.

What happens if you repeat the experiment with your left hand?

[dylan604]

if it was my left arm, are negative scores possible?

[NKosmatos]

Same here, and I always write the “a, o” clockwise. I was surprised to see my circle drawing skill is better anti clockwise :-)

[sbaiddn]

i think clockwise starting from the on your right hand naturally wants to drift rightward. Counterclockwise cancels the drift?

Have you tried switching hands and starting from the bottom?

[kibibyte]

This explains why I'm able to achieve my lowest ever score (0.7%) by starting a sort of spiral shape near the dot, whereas drawing that spiral in reverse would be much closer to perfect (>85%).

[sixstringtheory]

This is what I aimed for since that is how a circle is defined in a cartesian equation: (x − a)^2 + (y − b)^2 = r^2 where a and b are the circle’s center point xy coordinates and r is radius.

[kbutler]

But is a square more of a perfect circle than an off-center perfect circle?

Seems like this should derive the best center point of your circle, rather than mandating the dot.

But yes, we are overthinking it...