ABSTRACT

Researchers frequently measure recognition of information in health messages by presenting participants with statements that were or were not in a message and then asking them to identify which were presented and which were not. Recognition scales are then calculated by summing the correct responses to both the true items and foils, or by summing the correct responses to the true items only. We used a sequence of psychometric analyses, including factor analysis and item response theory (IRT) analysis, to evaluate two recognition measures of this type, using data from previously published studies. We found that foils are less associated with true items than true items are with one another, or more practically, that foils are less associated with the underlying dimension of interest. These results provide researchers with insight into how recognition items function, as well as a better analytic approach for use in future studies.

摘要

研究人员经常通过向参与者展示信息中存在或不存在的陈述来衡量对健康信息中信息的识别度，然后要求他们识别哪些信息出现了，哪些没有。然后通过对真实项目和箔片的正确响应相加，或通过仅对真实项目的正确响应相加来计算识别量表。我们使用了一系列心理测量分析，包括因素分析和项目反应理论 (IRT) 分析，使用来自先前发表的研究的数据来评估这种类型的两种识别措施。我们发现箔与真实物品的关联性低于真实物品与彼此之间的关联，或者更实际地，箔与感兴趣的潜在维度的关联性较低。