身体活动干预中的剂量反应关系:更长的持续时间,会话数量和接触时间是否增强了行为变化?
Paschal Sheeran1, Alexander Kenny1, Hannah Evans1
1Department of Psychology and Neuroscience, University of North Carolina at Chapel Hill.
概括
更高的干预剂量并没有改善身体活动行为变化. 研究结果表明,剂量可能适度干预内容,而不是直接驱动行为. 健康心理学研究人员可能会高估剂量-效果关系.
科学领域:
- 行为科学 行为科学
- 健康心理学 心理健康心理学
- 干预科学 干预科学
背景情况:
- 干预剂量,包括持续时间,会话号码和接触时间,通常被认为与健康行为变化相关.
- 之前的研究还没有最终确定干预剂量对促进体育活动的影响.
研究的目的:
- 调查干预剂量与健康行为变化,特别是身体活动之间的关系.
- 检查干预的持续时间,会议数量或总接触时间是否影响体育活动干预的有效性.
主要方法:
- 研究1:综合了161个体育活动干预措施的元分析,以评估剂量效果关系.
- 研究2:重新分析了初级研究,检查了剂量指数 (持续时间,疗程,接触时间) 和干预效应大小之间的关联.
- 探索性研究:评估了健康心理学研究人员对剂量效应关联的估计.
主要成果:
- 在元分析中,剂量指数与干预效果大小之间的关系被评估为23.6%,70%-85%没有显著关联.
- 在研究2中,持续时间与效果大小的负相关性很小 (b = - - 002),而治疗次数和接触时间与有效性无关.
- 健康心理学研究人员大大高估了干预剂量和效果大小之间的关联.
结论:
- 与预期相反,更高的干预剂量与增加的身体活动没有直接关系.
- 干预剂量可能充当干预内容的调节者,间接影响其影响,而不是直接导致行为变化.
- 这些发现挑战了普遍的假设,即更高的干预剂量等同于在促进身体活动方面更高的有效性.
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