University of North Carolina Wilmington.
J Appl Behav Anal. 2014 Summer;47(2):231-45. doi: 10.1002/jaba.119. Epub 2014 Apr 17.
An estimated 30% of Americans meet the criteria for obesity. Effective, low-cost interventions to increase physical activity are needed to prevent and treat obesity. In this study, 11 healthy adults wore Fitbit accelerometers for 3 weeks. During the initial baseline, subjects earned prize draws for wearing the Fitbit. During intervention, percentile schedules were used to calculate individual prize-draw criteria. The final week was a return to baseline. Four subjects increased step counts as a result of the intervention. A bout analysis of interresponse times revealed that subjects increased overall step counts by increasing daily minutes active and within-bout response rates and decreasing pauses between bouts of activity. Strategies to improve effectiveness are suggested, such as modification of reinforcement probability and amount and identification of the function of periods of inactivity.
据估计，30%的美国人符合肥胖标准。需要有效的、低成本的干预措施来增加身体活动，以预防和治疗肥胖。在这项研究中，11 名健康成年人佩戴 Fitbit 加速度计 3 周。在初始基线期间，参与者因佩戴 Fitbit 而获得抽奖机会。在干预期间，使用百分位时间表来计算个人抽奖标准。最后一周是回到基线。有 4 名参与者由于干预而增加了步数。反应时的爆发分析表明，参与者通过增加每天活跃的分钟数、爆发内的反应率以及减少爆发之间的停顿来增加总步数。建议采取一些提高效果的策略，例如修改强化概率和数量，以及确定不活动期的功能。
