Márquez-Barquero, M. and Azofeifa-Mora, C. 2018. LEARNING DELIVERY AND COMMITMENT, PERCEIVED MOTOR COMPETENCE, AND ANXIETY WHEN MAKING MISTAKES OR UNDER STRESS: MOTIVATING FACTORS IN ADOLESCENTS FOR ACHIEVEMENT DURING PHYSICAL EDUCATION CLASSES. MHSalud: Revista en Ciencias del Movimiento Humano y Salud. 16, 1 (Nov. 2018), 1–12. DOI:https://doi.org/10.15359/mhs.16-1.3.