Shortening the S-STAI: Consequences for research and clinical practice
Shortening the S-STAI: Consequences for research and clinical practice
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DOI：
10.1016/j.jpsychores.2013.03.013
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发表时间：
2013-08-01
影响因子：
4.7
通讯作者：
Sijtsma, Klaas
中科院分区：
文献类型：
--
作者：
Kruyen, Peter M.;Emons, Wilco H. M.;Sijtsma, Klaas
目的：为获得一种更有效的状态-特质焦虑量表（S-STAI），笔者提出了一种简化版的状态量表。心理测量学理论表明，测试缩短使总分更容易受到测量误差的影响，这可能导致不准确和有偏见的研究结果，并增加对个人做出错误决定的风险。本研究旨在探讨S-STAI精简版本的信度和测量精度是否足以用于心理学研究和临床实践中对个体的决策。方法：采用二次资料分析，比较12份缩短版S-STAI与20项完整版S-STAI的信度和测量精度。这个包含20个条目的版本的数据来自之前在荷兰进行的一项纵向研究，研究对象包括377名患者和他们的375名家庭成员。这是我们的主数据集。进行了一项文献研究，以确定在研究和临床实践中使用的缩短的S-STAI版本。每个缩短版本的数据都是从主数据集中通过从20个条目版本中选择相关条目获得的。所有分析均采用经典检验理论统计方法进行。结果：测验缩短对总分信度的影响较小，对测量精度的影响较大，对个体诊断和个体变化评估的影响不明确。结论：我们得出结论，S-STAI的缩短版本似乎可以接受研究目的，但在临床实践中可能存在问题。(C) 2013爱思唯尔公司版权所有。
Objective: Several authors proposed a shortened version of the State scale of the State-Trait Anxiety Inventory (S-STAI) to obtain a more efficient measurement instrument. Psychometric theory shows that test shortening makes a total score more vulnerable to measurement error, and this may result in inaccurate and biased research results and an increased risk of making incorrect decisions about individuals. This study investigated whether the reliability and the measurement precision of shortened versions of the S-STAI are adequate for psychological research and making decisions about individuals in clinical practice.Methods: Secondary data analysis was used to compare reliability and measurement precision between twelve shortened S-STAI versions and the full-length 20-item S-STAI version. Data for the 20-item version came from a longitudinal study performed previously in the Netherlands and included 377 patients and 375 of their family members. This was our master data set. A literature study was conducted to identify shortened S-STAI versions that are used in research and clinical practice. Data for each shortened version were obtained from the master data set by selecting the relevant items from the 20-item version. All analyses were done by means of classical test theory statistics.Results: The effect of test shortening on total-score reliability was small, the effect on measurement precision was large, and the effect on individual diagnosis and assessment of individual change was ambiguous.Conclusion: We conclude that shortened versions of the S-STAI seem to be acceptable for research purposes, but may be problematic in clinical practice. (C) 2013 Elsevier Inc. All rights reserved.