I haven’t looked too much into that paper, but yeah, it could be that at smaller scales you are just perceiving the friction.
But just from personal experience, I am pretty confident that at least in the 10μm-100μm range humans have high fidelity tactile perception, and are able to distinguish various patterns and not just friction.
I haven’t looked too much into that paper, but yeah, it could be that at smaller scales you are just perceiving the friction.
But just from personal experience, I am pretty confident that at least in the 10μm-100μm range humans have high fidelity tactile perception, and are able to distinguish various patterns and not just friction.