Are you a robot?

Tangentially related: I wonder whether pages could use visual illusions for captchas.

For example https://michaelbach.de/ot/mot-feetLin/index.html where the robot --I think-- would fail to see the illusion.

Though, I guess there isn't any advantage or the would be used frequently.

I wonder if all humans would see it.

Like you, when I switched focus from the middle, the feet changed from a smooth movement to tiny steps.

Is that the same sort of principle with some Christmas lights, e.g, the ones with lights that seem to travel along the length of the wire, yet they are only flashing? 

ArchaeC said:

Is that the same sort of principle with some Christmas lights, e.g, the ones with lights that seem to travel along the length of the wire, yet they are only flashing?

I am not sure, it gets quite mixed up between perception and psychology (like expectations etc.), so it's hard to distinguish for me.

ArchaeC said:

Is that the same sort of principle with some Christmas lights, e.g, the ones with lights that seem to travel along the length of the wire, yet they are only flashing?

I am not sure, it gets quite mixed up between perception and psychology (like expectations etc.), so it's hard to distinguish for me.