If I&#x27;m reading the source article correctly (linked below by Perixoog), it sounds like change was so subtle that the participants themselves weren&#x27;t even aware of it:<p>&quot;Participants were unaware of this manipulation&quot;<p>&quot;We chose to manipulate sensorimotor variability so that participants were unaware of the fact that there was any change in the task&quot;<p>[1] <a href="http:&#x2F;&#x2F;www.cell.com&#x2F;cms&#x2F;attachment&#x2F;2045379445&#x2F;2056784269&#x2F;mmc2.pdf" rel="nofollow">http:&#x2F;&#x2F;www.cell.com&#x2F;cms&#x2F;attachment&#x2F;2045379445&#x2F;2056784269&#x2F;mmc...</a><p>So not only are the tasks similar, but they&#x27;re so similar that participants weren&#x27;t consciously aware that they were doing something different. Wacky<p>They also mention that &quot;participants strengthened skill through the re-exploration of sensorimotor space.&quot;<p>I wonder how large an exploration of the sensorimotor space could be while generalizing&#x2F;improving the original skill. (re batting and kendo).  No idea, but interesting article either way