1. Specific Didactics Department, Research Methods and Diagnosis in Education, University of A Coruña, 15001 A Coruña, Spain
2. Faculty of Education, University of Camilo José Cela, 28692 Madrid, Spain
3. Department of Education, Area of Physical and Sports Education, University of Cantabria, 39005 Santander, Spain
4. Faculty of Teacher Training, University of Santiago de Compostela, 27001 Lugo, Spain