Validation of the subjective numeracy scale: Effects of low numeracy on comprehension of risk communications and utility elicitations
Validation of the subjective numeracy scale: Effects of low numeracy on comprehension of risk communications and utility elicitations
复制标题
DOI：
10.1177/0272989x07303824
复制
发表时间：
2007-09-01
影响因子：
3.6
通讯作者：
Fagerlin, Angela
中科院分区：
文献类型：
--
作者：
Zikmund-Fisher, Brian J.;Smith, Dylon M.;Fagerlin, Angela
背景在一篇配套文章中，作者描述了主观计算能力量表（SNS），这是一种对数字能力和数字偏好的自我评估，与客观计算能力密切相关。Objective.本文的目的是验证主观算术量表使用的措施，，，，受试者的回忆和理解复杂的风险统计和完成效用启发的能力。研究设计。这项研究由3个普通公众调查组成：2个通过网络进行，我通过纸和笔进行。科目研究1和3分别调查了862人和1234人，通过全国性的商业互联网调查小组招募。研究2涉及245人，他们在退伍军人管理局医院完成了纸笔调查。措施作者测试了一个人在SNS上的分数是否预测了正确回忆和解释风险信息的可能性。主观算术量表（SNS）是一种自我报告的测量方法，用于测量执行各种数学任务和偏好的感知能力！数字信息和散文信息的区别(1)8项量表不包含数学问题，也没有正确或不正确的答案。相反，问卷包括四个问题，要求受访者评估他们在不同情况下的计算能力，以及四个问题，要求他们说明他们对数字和概率信息的偏好。由于SNS测量的是对定量能力的感知，而不是能力本身，我们希望它能作为客观计算能力测试的一个有价值但不完美的替代品。我们的配套文章（1）表明，SNS是可靠的和高度（研究1和2A）或有效地完成时间权衡或个人权衡效用启发（研究2B和3）的可能性。在研究1和2中，作者还测试了定量能力的客观测试是否能预测表现。结果在所有研究中，SNS得分较高的调查参与者的表现明显优于其他受访者。SNS的预测能力接近观察到的客观算术。结论. SNS有效地预测风险的理解和完成的效用启发，而不需要调查参与者完成耗时和压力诱导的数学测试。作者鼓励在各种卫生服务研究环境中使用SNS。
Background. In a companion article, the authors describe the Subjective Numeracy Scale (SNS), a self-assessment Of numerical aptitude and preferences for numbers that correlates strongly with objective numeracy. Objective. The objective of this article is to validate the Subjective Numeracy Scale using measure,,; of subjects' capacity to recall and comprehend complex risk statistics and to complete utility elicitations. Research Design. The study is composed of 3 general public surveys: 2 administered via the Web and I by paper and pencil. Subjects. Studies 1 and 3 surveyed 862 and 1234 people, respectively, recruited via a nationwide commercial Internet survey panel. Study 2 involved 245 people who completed paper-and-pencil surveys in a Veterans Administration hospital. Measures. The authors tested whether one's score on the SNS predicted the likelihood Of correct recall and interpretation of risk information T he Subjective Numeracy Scale (SNS) is a selfreport measure of perceived ability to perform various mathematical tasks and preference! for the use of numerical versus prose information.(1) The 8-item scale contains no mathematics questions and has no correct or incorrect answers. Instead., it consists of 4 questions asking respondents to assess their numerical ability in different contexts and 4 questions asking them to state their preferences for the presentation of numerical and probabilistic information. Because the SNS measures perceptions of quantitative ability rather than the ability itself, we expected it to serve as a valuable, but imperfect, proxy for tests of objective numeracy. Our companion article(1) shows that the SNS is both reliable and highly (,studies 1 and 2A) or the likelihood of effectively completing a time tradeoff or person-tradeoff utility elicitation (studies 2B and 3). In Studies 1 and 2, the authors also tested whether an objective test of quantitative ability would predict performance. Results. In all studies, Survey participants with higher SNS scores performed significantly better than other respondents. The predictive ability of the SNS approached that observed for objective numeracy. Conclusions. The SNS effectively predicts both risk comprehension and completion of utility elicitations without requiring survey participants to complete time-consuming and stress-inducing mathematics tests. The authors encourage the use of the SNS in a variety of health services research contexts.