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Seung Ho Chang, Kyungun Kim, Jihyun Lee and Sukho Lee

Background: Children and youths from low-income families and certain ethnic minority groups show high levels of risk and vulnerability to physical inactivity. The aim of this review was to examine the effectiveness of interventions to increase physical activity (PA) in children and youths from low-income and ethnic minority (LIEM) families. Methods: Eight databases were systematically searched for PA interventions for LIEM children and youths. Twenty-six studies were included in the analyses. Effect sizes (ESs) were calculated using a random-effects model. The ESs were computed using Hedges g with 95% confidence interval. Results: There were small to medium effects of interventions on PA in LIEM children and youth (Q = 1499.193, df = 30, P < .05; I 2 = 97.999). Analyses on the moderator variables showed that ES for participants aged 9–12 years (ES = 0.542, P = .01); intervention length less than 13 weeks (ES = 0.561, P = .01); specialists as the intervention agent (ES = 0.680, P < .05); interventions without technology (ES = 0.363, P = .02); and interventions with a behavioral modification component (ES = 0.336, P = .03) were significantly different from zero. Conclusion: PA intervention can be an effective strategy to increase PA for LIEM children and youths.

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Lynn L. Ridinger, Kyungun R. Kim, Stacy Warner and Jacob K. Tingle

Building on the current sport officiating research, this study puts forth the Referee Retention Scale. Through a three-phase process, the researchers developed a valid and reliable scale to predict sport officials’ job satisfaction and intention to continue. The first phase consisted of instrument development, whereas the second phase included field testing of referees (n = 253). After exploratory factor analysis and Rasch analysis, the resultant refined scale from Phases 1 and 2 was then administered to 979 referees in Phase 3. Phase 3 results using confirmatory factor analysis indicated that the seven-factor, 28-item Referee Retention Scale was a valid and reliable tool for measuring and predicting referee retention. The results highlight the importance of considering a variety of factors associated with the referee experience, which include administrator consideration, intrinsic motives, mentoring, remuneration, sense of community, lack of stress, and continuing education. A discussion on how the Referee Retention Scale can help administrators manage and retain sport officials is included.