@文章{信息:doi/10.2196/29664，作者="Hachaturyan, Violetta和Adam, Maya和Favaretti, Caterina和Greuel, Merlin和Gates, Jennifer和B{\"a}rnighausen, Till和Vandormael, Alain"，标题="在减糖信息视频中对社会权威的抗拒:基于网络的4013名参与者的随机对照试验"，期刊="J Med Internet Res"，年="2021"，月="11"，日="22"，量="23"，数="11"，页="e29664"，关键词="减糖;电抗;动画视频;数字的干预;背景:基于动画故事的短视频是一种有效的健康信息宣传策略。然而，健康促进策略往往会引起对健康信息的拒绝，这种现象被称为抗拒。在这项研究中，我们研究了SAS视频的儿童叙述者(被认为没有威胁性，社会权威低)是否最大限度地减少了对摄入添加糖的健康信息的抗拒。摘要目的:这项研究旨在确定，与内容安慰剂视频(关于防晒霜的健康信息)和安慰剂视频(关于地震的非健康信息)相比，我们的SAS干预视频是否减弱了对糖信息的抗拒，并确定与同一SAS的母亲叙述者(对目标受众具有同等的社会权威)或家庭医生叙述者(高度的社会权威)相比，儿童叙述者是否更有效地降低了对糖信息的抗拒视频。 Methods: This is a web-based randomized controlled trial comparing an intervention video about sugar reduction narrated by a child, the child's mother, or the family physician with a content placebo video about sunscreen use and a placebo video about earthquakes. The primary end points are differences in the antecedents to reactance (proneness to reactance, threat level of the message), its components (anger and negative cognition), and outcomes (source appraisal and attitude). We performed analysis of variance on data collected (N=4013) from participants aged 18 to 59 years who speak English and reside in the United Kingdom. Results: Between December 9 and December 11, 2020, we recruited 38.62{\%} (1550/4013) men, 60.85{\%} (2442/4013) women, and 0.52{\%} (21/4013) others for our study. We found a strong causal relationship between the persuasiveness of the content promoted by the videos and the components of reactance. Compared with the placebo (mean 1.56, SD 0.63) and content placebo (mean 1.76, SD 0.69) videos, the intervention videos (mean 1.99, SD 0.83) aroused higher levels of reactance to the message content (P<.001). We found no evidence that the child narrator (mean 1.99, SD 0.87) attenuated reactance to the sugar reduction message when compared with the physician (mean 1.95, SD 0.79; P=.77) and mother (mean 2.03, SD 0.83; P=.93). In addition, the physician was perceived as more qualified, reliable, and having more expertise than the child (P<.001) and mother (P<.001) narrators. Conclusions: Although children may be perceived as nonthreatening messengers, we found no evidence that a child narrator attenuated reactance to a SAS video about sugar consumption when compared with a physician. Furthermore, our intervention videos, with well-intended goals toward audience health awareness, aroused higher levels of reactance when compared with the placebo videos. Our results highlight the challenges in developing effective interventions to promote persuasive health messages. Trial Registration: German Clinical Trials Registry DRKS00022340; https://tinyurl.com/mr8dfena International Registered Report Identifier (IRRID): RR2-10.2196/25343 ", issn="1438-8871", doi="10.2196/29664", url="//www.mybigtv.com/2021/11/e29664", url="https://doi.org/10.2196/29664", url="http://www.ncbi.nlm.nih.gov/pubmed/34813490" }