The purpose of the four studies described in this article was to develop and test a new measure of competitive sport participants' intrinsic motivation, extrinsic motivation, and amotivation (self-determination theory; Deci & Ryan, 1985). The items for the new measure, named the Behavioral Regulation in Sport Questionnaire (BRSQ), were constructed using interviews, expert review, and pilot testing. Analyses supported the internal consistency, test-retest reliability, and factorial validity of the BRSQ scores. Nomological validity evidence was also supportive, as BRSQ subscale scores were correlated in the expected pattern with scores derived from measures of motivational consequences. When directly compared with scores derived from the Sport Motivation Scale (SMS; Pelletier, Fortier, Vallerand, Tuson, & Blais, 1995) and a revised version of that questionnaire (SMS-6; Mallett, Kawabata, Newcombe, Otero-Forero, & Jackson, 2007), BRSQ scores demonstrated equal or superior reliability and factorial validity as well as better nomological validity.

The purpose of this study was to examine whether the relationships between contextual factors (i.e., autonomy-supportive vs. controlling coaching style) and person factors (i.e., autonomous vs. controlled motivation) outlined in self-determination theory (SDT) were related to prosocial and antisocial behaviors in sport. We also investigated moral disengagement as a mediator of these relationships. Athletes' (n = 292, M = 19.53 years) responses largely supported our SDT-derived hypotheses. Results indicated that an autonomy-supportive coaching style was associated with prosocial behavior toward teammates; this relationship was mediated by autonomous motivation. Controlled motivation was associated with antisocial behavior toward teammates and antisocial behavior toward opponents, and these two relationships were mediated by moral disengagement. The results provide support for research investigating the effect of autonomy-supportive coaching interventions on athletes' prosocial and antisocial behavior.

In this exploratory study, we examined hypothesized antecedents (basic psychological needs) and consequences (dispositional flow) of athlete engagement (AE); plus the extent to which AE mediated the relationship between basic needs and flow. Structural equation modeling with a sample of 201 elite Canadian athletes (60.20% female, mean age = 22.92 years) showed that needs satisfaction (particularly competence & autonomy) predicted athlete engagement (30% explained variance); and needs satisfaction and athlete engagement predicted dispositional flow (68% explained variance). AE partially mediated the relationship between needs satisfaction and flow. Practical suggestions are offered for needs-supportive coaching programs designed to increase both AE and flow.

The results of this meta-analysis indicate a medium effect size relationship between general physical self-concept, perceived competence and perceived fitness and physical activity in young people. • General physical self-concept, perceived competence and perceived fitness may act as both determinants and outcomes of physical activity behaviour in youth. • Strategies to enhance physical self-perceptions in children and adolescents may assist in efforts to promote physical activity.

Using basic psychological needs theory (BPNT; as our guiding framework, we explored cultural differences in the relationships among Physical Education (PE) students' perceptions of teacher autonomy support, psychological need satisfaction, subjective vitality and effort in class. Seven hundred and fifteen students (age range from 13-15 years) from the UK and Hong Kong, China completed a multi-section inventory during a timetabled PE class. Multilevel analyses revealed that the relationships among autonomy support, subjective vitality and effort were mediated by students' perceptions of psychological need satisfaction. The relationship between autonomy support and perceptions of competence was stronger in the Chinese sample, compared to the UK sample. Also, the relationship between perceptions of relatedness and effort was not significant in the Chinese students. The findings generally support the pan-cultural utility of BPNT and imply that a teacher-created autonomy supportive environment may promote positive student experiences in both cultures.