Measurement of Youth Media Exposure and Health Outcomes

描述（由申请人提供）：大量研究证据表明，接触娱乐媒体（电视、电影、音乐、视频游戏和互联网）与关键的青少年健康结果有关，包括肥胖、酒精和烟草使用。这项研究受到数据收集措施薄弱和狭隘地关注电视观看的限制。媒体的使用急剧增长和多样化，青年在媒体丰富的环境中长大，经常同时处理两种或两种以上的媒体。这项研究的广泛，长期的目标是验证青年媒体接触（MYME），旨在获得一个更敏感和全面的评估青少年使用和接触娱乐媒体的多方法工具的测量。其具体目标是测试MYME的可行性和可接受性，评估MYME的可靠性和有效性，并评估MYME预测超重，饮酒和吸烟等关键青少年健康风险的能力。MYME结合了回忆估计（RE），时间使用日记（TUD）和瞬时采样（MS）的既定互补方法，因此每个方法的优势可以弥补其他方法的局限性。150名13至15岁的青少年将完成他们的媒体曝光，酒精和烟草使用状况的RE，并在登记时测量他们的身高和体重（RE 0）。他们将携带PDA和视频摄像机1周，通过回答关于媒体接触的问题（包括内容，背景和他们的精神状态）来回应随机信号，并记录他们的环境，活动和媒体接触。在随机选择的工作日和周末，参与者将保持24小时TUD的活动，包括媒体使用，内容和使用环境。在周末，参与者将归还他们的设备并执行RE1，回忆他们在过去一周的媒体使用情况。他们将在休息1周后再次完成完整的MYME方案，以便评估每个MYME组件和整个测量的可靠性和有效性。完成MYME一年后，将对参与者进行称重和测量，并再次完成RE0评估媒体暴露和物质使用。这项研究将评估对青少年媒体接触和关键健康结果的更敏感、全面和准确的测量，目标是制定更有效的预防计划。公共卫生相关性：年轻人接触媒体与肥胖、吸烟和饮酒有关。然而，由于研究方法侧重于过时的媒体技术和使用模式，因此很难明确描述这些关系并制定有效的预防和干预战略。拟议的研究将测试一种创新的方法，以获得更敏感和全面的测量媒体曝光的多媒体环境和多任务的生活方式，今天的青年。

DESCRIPTION (provided by applicant): Exposure to entertainment media (TV, movies, music, video games and the Internet) has been associated with key adolescent health outcomes, including obesity, alcohol, and tobacco use, by a large body of research evidence. This research has been limited by weak data collection measures and a narrow focus on television viewing. Media use has grown and diversified dramatically, with youth growing up in media-rich environments, often multitasking with 2 or more media simultaneously. The broad, long-term objective of this study is to validate Measurement of Youth Media Exposure (MYME), a multimethod instrument designed to obtain a more sensitive and comprehensive assessment of adolescent use of and exposure to entertainment media. Its specific aims are to test the feasibility and acceptability of MYME, to assess MYME's reliability and validity, and to evaluate MYME's ability to predict key adolescent health risks of overweight, alcohol use, and tobacco smoking. MYME combines established, complementary methods of Recall Estimate (RE), Time-Use Diary (TUD), and Momentary Sampling (MS) so the strengths of each compensate for limitations of others. 150 youth 13 to 15 years old will complete a RE of their media exposure, alcohol and tobacco use status and have their height and weight measured on enrollment (RE0). They will carry a PDA and video camcorder for 1 week, responding to random signals by answering questions on their media exposure, including content, context and their state of mind, and video recording their environments, activities, and media exposures. On a randomly selected weekday and weekend day, participants will keep a 24 hour TUD of their activities, including media use, content, and context of use. At the end of the week, participants will return their equipment and execute RE1, recalling their media use over the past week. They will complete the full MYME protocol again after 1 week off, so that each MYME component and the whole measure can be evaluated for reliability and validity. One year after completing MYME, participants will be weighed and measured and will again complete RE0 assessing media exposure and substance use. This study will evaluate a more sensitive, comprehensive and accurate measurement of youth media exposure and key health outcomes with the goal of developing more effective prevention programs. PUBLIC HEALTH RELEVANCE: Young people's exposure to media has been linked to obesity, smoking, and alcohol use. However, it has been difficult to definitively characterize the relationships and to develop effective prevention and intervention strategies because research methods have focused on obsolete media technologies and use patterns. The proposed research will test an innovative method of obtaining a more sensitive and comprehensive measurement of media exposure in the multimedia environments and multitasking lifestyles of today's youth.