Melin Jeanette, Fridberg Helena, Hansson Eva Ekvall, Smedberg Daniel, Pendrill Leslie
Measurement Science and Technology Unit, Division of Safety and Transport, RISE Research Institutes of Sweden, 41258 Gothenburg, Sweden.
Department of Leadership, Demand and Control, Swedish Defence University, 65340 Karlstad, Sweden.
Entropy (Basel). 2023 Jun 15;25(6):940. doi: 10.3390/e25060940.
Both construct specification equations (CSEs) and entropy can be used to provide a specific, causal, and rigorously mathematical conceptualization of item attributes in order to provide fit-for-purpose measurements of person abilities. This has been previously demonstrated for memory measurements. It can also be reasonably expected to be applicable to other kinds of measures of human abilities and task difficulty in health care, but further exploration is needed about how to incorporate qualitative explanatory variables in the CSE formulation. In this paper we report two case studies exploring the possibilities of advancing CSE and entropy to include human functional balance measurements. In case study I, physiotherapists have formulated a CSE for balance task difficulty by principal component regression of empirical balance task difficulty values from Berg's Balance Scale transformed using the Rasch model. In case study II, four balance tasks of increasing difficulty due to diminishing bases of support and vision were briefly investigated in relation to entropy as a measure of the amount of information and order as well as physical thermodynamics. The pilot study has explored both methodological and conceptual possibilities and concerns to be considered in further work. The results should not be considered as fully comprehensive or absolute, but rather open up for further discussion and investigations to advance measurements of person balance ability in clinical practice, research, and trials.
结构规范方程（CSEs）和熵都可用于提供项目属性的特定、因果且严格的数学概念化，以便对个人能力进行符合目的的测量。这在记忆测量方面已有先例。同样可以合理预期它适用于医疗保健中人类能力和任务难度的其他测量类型，但对于如何在CSE公式中纳入定性解释变量仍需进一步探索。在本文中，我们报告了两个案例研究，探讨推进CSE和熵以纳入人体功能平衡测量的可能性。在案例研究I中，物理治疗师通过对使用Rasch模型转换后的伯格平衡量表的经验平衡任务难度值进行主成分回归，制定了平衡任务难度的CSE。在案例研究II中，简要研究了由于支撑基础和视觉减少而难度增加的四项平衡任务与作为信息和秩序量度以及物理热力学的熵的关系。该初步研究探索了方法和概念上的可能性以及在进一步工作中需考虑的问题。这些结果不应被视为完全全面或绝对的，而应开启进一步的讨论和调查，以推进临床实践、研究和试验中个人平衡能力的测量。
