Lopes David, Arnrup Kristina, Robertson Agneta, Lundgren Jesper
Department of Psychology, University of Gothenburg, Göteborg, Sweden.
Eur J Oral Sci. 2013 Jun;121(3 Pt 2):277-82. doi: 10.1111/eos.12040. Epub 2013 Apr 22.
Rasch analysis was used to examine the validity of the Children's Fear Survey Schedule - Dental Subscale (CFSS-DS). Data were collected from parents of children in regular dental care (n = 240) and from parents of children referred to a specialized pediatric dental clinic (n = 200). The Rasch model is a probabilistic model in which estimations are based on the relationship between person ability and item difficulty, and the present study investigated the validity of the CFSS-DS through analysis of person and item fit, dimensionality, ordering of thresholds, local dependency, and differential item functioning. The results show multidimensionality of the original scale, and an adjusted version consisting of six items with good fit to the model is suggested. The adjusted scale makes interval-level analysis possible, and time efficiency and elimination of previously criticized items argue in favor of the adjusted scale.
采用拉施分析来检验儿童恐惧调查表 - 牙科分量表（CFSS - DS）的有效性。数据收集自接受常规牙科护理儿童的家长（n = 240）以及被转诊至专业儿科牙科诊所儿童的家长（n = 200）。拉施模型是一种概率模型，其估计基于个体能力与项目难度之间的关系，本研究通过分析个体与项目的拟合度、维度、阈值排序、局部依赖性和项目功能差异来调查CFSS - DS的有效性。结果显示原始量表具有多维性，并建议采用由六个与模型拟合良好的项目组成的调整版量表。调整后的量表使得区间水平分析成为可能，并且时间效率以及对先前受批评项目的消除都支持调整后的量表。
