Proios, M. & Proios, I.M. (2014). Development and initial validation of an instrument measuring athletes' volition. J. Hum. Sport Exerc., 9(4), pp.761-772. This study describes the development and initial validation of a new instrument for the measurement of athletes' volition -the Measure Athletes' Volition (MAV). The findings from the exploratory factor analyses, which used 371 adolescent athletes, provided evidence for a six-factor solution with 23-item -goal (three items), effort with difficulties (four items), effort continuous (three items), persistence on effort (five items), decision making (three items), and intention (five items). Confirmatory factor analysis indicated that a 23-item and six-factor structure provided acceptable model fit. In addition, the findings further supported the reliability of the above mentioned model.