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)与青少年的主要健康结果有关，包括肥胖、酒精和烟草使用。这项研究一直受到数据收集措施薄弱和对电视观看的狭隘关注的限制。媒体使用急剧增长和多样化，年轻人在媒体丰富的环境中长大，经常同时处理两个或更多媒体的多项任务。这项研究的广泛和长期目标是验证青年媒体暴露测量(MYME)，这是一个多方法工具，旨在获得对青少年使用和接触娱乐媒体的更敏感和更全面的评估。它的具体目的是测试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结合了已建立的、互补的回忆估计(RE)、时间使用日记(TUD)和瞬时抽样(MS)方法，因此每种方法的优势都弥补了其他方法的局限性。150名13至15岁的青少年将完成媒体接触、酒精和烟草使用状况的RE，并在注册时测量他们的身高和体重(RE0)。他们将携带一台掌上电脑和摄像机，为期一周，通过回答有关他们媒体曝光的问题来回应随机信号，包括内容、背景和精神状态，并视频记录他们的环境、活动和媒体曝光。在随机选择的工作日和周末，参与者将对他们的活动进行24小时TUD，包括媒体使用、内容和使用环境。在本周结束时，参与者将归还他们的设备并执行RE1，回顾他们过去一周的媒体使用情况。他们将在休息一周后再次完成完整的MYME方案，以便对MYME的每个组成部分和整个测量进行信度和效度评估。在完成MYME一年后，参与者将被称重和测量，并将再次完成RE0评估媒体暴露和物质使用。这项研究将评估一种更敏感、更全面和更准确地衡量青年媒体暴露和关键健康结果的方法，以期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，因此很难确定这些关系的特征并制定有效的预防和干预战略。这项拟议的研究将测试一种创新的方法，以更敏感和更全面地衡量当今年轻人在多媒体环境和多任务生活方式中的媒体曝光率。

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.