Hallgren Kevin A, Barnett Nancy P
Department of Psychiatry and Behavioral Sciences.
Center for Alcohol and Addiction Studies, Brown University.
Psychol Addict Behav. 2016 Dec;30(8):955-964. doi: 10.1037/adb0000218. Epub 2016 Sep 26.
The Important People instrument (IP; Longabaugh et al., 2010) is one of the most commonly used measures of social network drinking. Although its reliability and validity are well-supported, the length of the instrument may limit its use in many settings. The present study evaluated whether a briefer, 5-person version of the IP (IP-5) adequately reproduces scores from the full IP. College freshmen (N = 1,053) reported their own past-month drinking, alcohol-related consequences, and information about drinking in their close social networks at baseline and 1 year later. From this we derived network members' drinking frequency, percentage of drinkers, and percentage of heavy drinkers, assessed for up to 10 (full IP) or 5 (IP-5) network members. We first modeled the expected concordance between full-IP scores and scores from simulated shorter IP instruments by sampling smaller subsets of network members from full IP data. Then, using quasi-experimental methods, we administered the full IP and IP-5 and compared the 2 instruments' score distributions and concurrent and year-lagged associations with participants' alcohol consumption and consequences. Most of the full-IP variance was reproduced from simulated shorter versions of the IP (ICCs ≥ 0.80). The full IP and IP-5 yielded similar score distributions, concurrent associations with drinking (r = 0.22 to 0.52), and year-lagged associations with drinking. The IP-5 retains most of the information about social network drinking from the full IP. The shorter instrument may be useful in clinical and research settings that require frequent measure administration, yielding greater temporal resolution for monitoring social network drinking. (PsycINFO Database Record
“重要人物”量表（IP；朗格baugh等人，2010年）是社交网络饮酒最常用的测量方法之一。尽管其信效度得到了充分支持，但该量表的长度可能会限制其在许多情况下的使用。本研究评估了一个更简短的、5人版的IP（IP - 5）是否能充分再现完整IP的得分。大学新生（N = 1053）在基线和1年后报告了他们自己过去一个月的饮酒情况、与酒精相关的后果以及他们亲密社交网络中的饮酒信息。由此我们得出了网络成员的饮酒频率、饮酒者百分比和重度饮酒者百分比，评估对象多达10名（完整IP）或5名（IP - 5）网络成员。我们首先通过从完整IP数据中抽取较小的网络成员子集，对完整IP得分与模拟的较短IP量表得分之间的预期一致性进行建模。然后，我们使用准实验方法，施测完整IP和IP - 5，并比较了这两种量表的得分分布以及与参与者饮酒量和后果的同时期及一年后的关联。完整IP的大部分方差都能从模拟的较短版本IP中再现（组内相关系数≥0.80）。完整IP和IP - 5产生了相似的得分分布、与饮酒的同时期关联（r = 0.22至0.52）以及与饮酒的一年后关联。IP - 5保留了完整IP中关于社交网络饮酒的大部分信息。这个更简短的量表可能在需要频繁施测的临床和研究环境中有用，能为监测社交网络饮酒提供更高的时间分辨率。（《心理学文摘数据库记录》
