Fingertip forces and perceptual ratings.

<p>The perceptual and kinetic measures for the full-vision, classic SWI task (left side) where participants lifted 3 blocks with different sizes, but identical masses, and the no-vision task (right side), where participants lifted the same block throughout the experiment without vision, varying only the size of the block that was seen before the lift. Error bars represent standard error of the mean of the difference between the small and large blocks.