Wadsworth, D. D.; Rudisill, M. E.; Hastie, P. A.; Boyd, K. L.; Rodriguez-Hernandez, M. Preschoolers´ Physical Activity and Time on Task During a Mastery Motivational Climate and Free Play. MHSalud 2014, 11 (1). https://doi.org/10.15359/mhs.11-1.3.