HIV/STD Prevention for Young Adults Online (RMI)

描述(由申请人提供)：这是一个开发和测试与“Youthnet”相关的方法学创新的应用程序，这是一项随机对照试验(RCT)，旨在通过临床样本测试基于计算机的、量身定做的互动避孕套使用信息的有效性，以增加对避孕套的积极结果预期、避孕套使用规范、避孕套谈判和使用的自我效能以及与非主要性伴的避孕套使用。对于这一方法学补充应用，我们将侧重于三个方法学目标：补充目标1：复制以临床为基础的Youthnet随机对照试验，在互联网上的两个不同网站上独家招募一个概率样本。补充目标2：使用互联网样本，测试为本研究编制的四个行为量表的心理测量学特性；使用避孕套的结果预期；避孕套规范；避孕套谈判的自我效能和使用的自我效能。补充目标3：比较诊所和互联网样本的a)招募和留存率以及b)结果预期、规范、安全套谈判和使用的自我效能以及安全套使用的基线和结果数据。我们将在本补充资料中回答的研究问题包括： 1.通过在线横幅广告招募的18-24岁的人会参加一项关于艾滋病毒/性传播疾病风险的研究吗？ 2.在网上注册的人员是否会返回参加为期一个月的强化课程和为期两个月的后续课程，以及人员流失程度如何？ 3.与基于临床的样本相比，在线样本的研究工具的心理测量学特性是否相同？ 4.对于在线样本，增加与非主要伴侣使用避孕套的干预效果如何？

DESCRIPTION (provided by applicant): This is an application to develop and test methodological innovations related to "Youthnet," a randomized controlled trial (RCT) that is designed to test, with a clinic-based sample, the efficacy of computer-based, tailored, interactive condom use messages for increasing positive outcome expectancies towards condoms, condom use norms, self-efficacy for condom negotiation and use, and condom use with non-main sexual partners. For this methodological supplemental application, we will focus on three methodological aims: Supplemental Aim 1: To replicate the clinic-based Youthnet RCT with a probability sample recruited exclusively on two separate sites on the Internet. Supplemental Aim 2: To test, using the Internet sample, the psychometric properties of four behavioral scales developed for this study; outcome expectancies for condom use; condom norms; self-efficacy for condom negotiation and self-efficacy for use. Supplemental Aim 3: To compare a) recruitment and retention rates and b) baseline and outcome data on outcome expectancies, norms, self-efficacy for condom negotiation and use and condom use of the clinic based and Internet-based samples. The study questions we will answer with this supplement include: 1. Will people aged 18-24 recruited through banner ads online enroll in a study about HIV/STD risk? 2. Will persons enrolled online return for a one-month booster session and a two-month follow- up session and with what level of attrition? 3. Are the psychometric properties of the study instrument the same for an online sample compared to a clinic-based sample? 4. What is the efficacy of the intervention for increasing condom use with non-main partners for the online sample?