College of Physical Education, Yangzhou University, Yangzhou, China DOI 10.7717/peerj.20012 Academic Editor Frank Lu Subject Areas Kinesiology, Neurology Keywords Attentional focus, Motor performance, Meta-analysis, Constrained action hypothesis, Action-goal hierarchy hypothesis Copyright © Licence This is an open access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, reproduction and adaptation in any medium and...