Department of Social and Behavioural Studies, Division of Psychology, Education, and Sociology, University West, Trollhättan, Sweden.
Int J Older People Nurs. 2021 Jan;16(1):e12352. doi: 10.1111/opn.12352. Epub 2020 Oct 27.
Given recent advances in psychometric assessment, there is a need for assessment studies using modern test theory in the field of person-centred care, mainly due to the dominant use of analytical strategies based on classical test theory. The main objective of the present study was thus to examine whether selected items from commonly used instruments of person-centred care were able to differentiate between respondents with a reasonably even level of measurement precision across different regions of the construct range using item response theory (IRT).
A Swedish sample of care staff in elderly care (N = 1342) completed a survey including a selection of items from three previously validated measures of person-centred care.
All questionnaire items were submitted to IRT analyses to examine the extent to which the items produced information on the underlying construct. The items exhibited different levels of information. However, in general, for those items exhibiting some information, the pattern of information across the trait range was similar for most of them, that is, the items discriminated better in the lower levels of person-centredness.
Item response theory analyses are instrumental in creating shorter measurement instruments that may perform nearly as well as the original longer instruments. Given time and other resource constraints in questionnaire administration, there is a gain in only including the most informative items which efficiently and evenly tap the underlying construct along its entire range and in the context of person-centred care assessment this study was an initial step towards this goal. Thus, a set of ten items with satisfactory levels of psychometric quality, that is relatively high information levels across a relatively broad range of the underlying construct, is proposed.
鉴于心理测量评估的最新进展，在以患者为中心的护理领域，需要使用现代测试理论进行评估研究，这主要是因为基于经典测试理论的分析策略占据主导地位。因此，本研究的主要目的是检验常用以患者为中心的护理工具中的一些项目，是否能够使用项目反应理论（IRT）在构建范围的不同区域，为具有合理均匀测量精度的受访者提供区分度。
对瑞典老年护理机构的护理人员（N=1342）进行了一项调查，该调查包括对三种先前验证过的以患者为中心的护理措施的选择项目进行评估。
所有问卷项目都进行了 IRT 分析，以检验项目在多大程度上为基础结构提供了信息。这些项目表现出不同程度的信息。然而，总体而言，对于那些具有一定信息的项目，其在特质范围内的信息模式对于大多数项目而言是相似的，也就是说，这些项目在较低的以患者为中心程度上的区分度更好。
项目反应理论分析有助于创建更短的测量工具，这些工具在性能上可能与原始的更长工具相当。鉴于问卷调查管理中的时间和其他资源限制，仅包括最具信息量的项目可以提高效率，并且沿着整个基础结构的整个范围均匀地挖掘基础结构，在以患者为中心的护理评估中，本研究是朝着这一目标迈出的初步一步。因此，提出了一组十项具有令人满意的心理测量质量的项目，即具有相对较高信息水平的相对较宽的基础结构范围。
