Dawei Bai @daweibai.bsky.social · 03/10/2025How about in this case? Surprisingly, most people *predominantly see 180° motion*, while 360° motion is hardly, if ever, perceived – even though the rings move in the same way as above! [3/6] 172
Dawei Bai @daweibai.bsky.social · 03/10/2025This suggests that the visual system ‘knows’ that objects cannot pass through each other (i.e. ‘solidity’ constraint), thus ‘forcing’ you to predominantly see the motion that respects solidity (180° co-rotation), rather than the motion that violates it (360° co-rotation)! [4/6] 230
Dawei Bai @daweibai.bsky.social · 03/10/2025Is this percept actually explained by the proximity of the rings? Have a look at these gapped rings. If you’re like most people, the unstable percept is restored – because the gaps remove the possibility of solidity violation. [5/6] 230
