For example, both Tracy et al. (2003), who observed differences in brain activation before and after two weeks of practice tying a complicated knot, and Puttemans et al. (2005), who looked at differences before and after eight days of practice performing a bimanual coordinated wrist movement, conclude that one possible interpretation of the data is that practice leads to reduced cognitive demands. Here too, one might interpret this to mean that the practiced individuals did not need to try as hard. However, again, since there is no need to think much about your movements when you are doing
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