School of Health Sciences, University of Akureyri, Akureyri, Iceland.
Arch Phys Med Rehabil. 2010 Jan;91(1):156-63. doi: 10.1016/j.apmr.2009.09.010.
Arnadottir SA, Lundin-Olsson L, Gunnarsdottir ED, Fisher AG. Application of Rasch analysis to examine psychometric aspects of the Activities-Specific Balance Confidence Scale when used in a new cultural context.
To investigate by using Rasch analysis the psychometric properties of the Activities-Specific Balance Confidence (ABC) Scale when applied in a new Icelandic context.
Cross-sectional, population-based, random selection from the Icelandic National Registry.
Community-based.
Icelanders (N=183), 65 to 88 years old, and 48% women.
Not applicable.
ABC, an instrument used to evaluate how confident older people are in maintaining balance and remaining steady when moving through the environment. An Icelandic translation of the ABC (ABC-ICE) scale was evaluated by implementing Rasch rating scale analysis to transform ordinal ABC-ICE scores into interval measures and evaluating aspects of validity and reliability of the scale.
Participants were not able to differentiate reliably between the 11 rating scale categories of the ABC-ICE. Additionally, 3 items failed to show acceptable goodness of fit to the ABC-ICE rating scale model. By collapsing categories and creating a new 5-category scale, only 1 item misfit. Removing that item resulted in a modified version of ABC-ICE with 5 categories and 15 items. Both item goodness-of-fit statistics and principal components analysis supported unidimensionality of the modified ABC-ICE. The ABC-ICE measures reliably separated the sample into at least 4 statistically distinct strata of balance confidence. Finally, the hierarchical order of item difficulties was consistent with theoretic expectations, and the items were reasonably well targeted to the balance confidence of the persons tested.
Rasch analysis indicated a need to modify the ABC-ICE to improve its psychometric properties. Further studies are needed to determine if similar analyses of other versions of the ABC, including the original one, will yield similar results.
Arnadottir SA、Lundin-Olsson L、Gunnarsdottir ED、Fisher AG。应用 Rasch 分析检验在新的文化背景下使用活动特异性平衡信心量表的心理测量学方面。
用 Rasch 分析检验在冰岛新环境下应用活动特异性平衡信心（ABC）量表的心理测量特性。
横断面、基于人群、从冰岛国家登记处随机选择。
基于社区。
冰岛人（N=183），年龄 65 至 88 岁，女性占 48%。
不适用。
ABC，一种用于评估老年人在环境中移动时保持平衡和稳定的信心的工具。ABC 的冰岛语翻译版（ABC-ICE）量表通过实施 Rasch 评分量表分析进行评估，将 ABC-ICE 的序数得分转换为区间测量，并评估量表的有效性和可靠性方面。
参与者无法可靠地区分 ABC-ICE 的 11 个评分类别。此外，3 个项目不符合 ABC-ICE 评分量表模型的可接受拟合度。通过合并类别和创建一个新的 5 类别量表，只有 1 个项目不匹配。删除该项目后，得到一个具有 5 个类别和 15 个项目的修改版 ABC-ICE。修改后的 ABC-ICE 的项目拟合度统计和主成分分析均支持单维性。ABC-ICE 可靠地将样本分为至少 4 个具有统计学差异的平衡信心层。最后，项目难度的层次顺序与理论预期一致，并且项目对所测试人员的平衡信心具有合理的针对性。
Rasch 分析表明需要修改 ABC-ICE 以提高其心理测量学特性。需要进一步研究以确定其他版本的 ABC（包括原始版本）的类似分析是否会产生类似结果。
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