Department of Nursing Science, Institute of Health and Society, Faculty of Medicine, University of Oslo, Blindern, Postbox 1130, 0318, Oslo, Norway.
Department for Patient Safety and Research, Lovisenberg Diakonale Hospital, Nydalen, Postboks 4970, 0440, Oslo, Norway.
BMC Psychol. 2017 Jun 8;5(1):18. doi: 10.1186/s40359-017-0187-y.
A person's sense of coherence (SOC) reflects their perception that the world is meaningful and predictable, and impacts their ability to deal with stressors in a health-promoting manner. A valid, reliable, and sensitive measure of SOC is needed to advance health promotion research based on this concept. The 13-item Sense of Coherence Scale (SOC-13) is widely used, but we reported in a previous evaluation its psychometric limitations when used with adults with morbid obesity. To determine whether the identified limitations were specific to that population or also generalize to other populations, we have replicated our prior study design and analysis in a new sample of adults with inflammatory bowel disease (IBD).
A sample of 428 adults with IBD completed the SOC-13 at a routine clinic visit in Norway between October 1, 2009 and May 31, 2011. Using a Rasch analysis approach, the SOC-13 and its three subscales were evaluated in terms of rating scale functioning, internal scale validity, person-response validity, person-separation reliability and differential item functioning.
Collapsing categories at the low end of the 7-category rating scale improved its overall functioning. Two items demonstrated poor fit to the Rasch model, and once they were deleted from the scale, the remaining 11-item scale (SOC-11) demonstrated acceptable item fit. However, neither the SOC-13 nor the SOC-11 met the criteria for unidimensionality or person-response validity. While both the SOC-13 and SOC-11 were able to distinguish three groups of SOC, none of the subscales could distinguish any such groups. Minimal differential item functioning related to demographic characteristics was also observed.
An 11-item version of the sense of coherence scale has better psychometric properties than the original 13-item scale among adults with IBD. These findings are similar to those of our previous evaluation among adults with morbid obesity and suggest that the identified limitations may exist across populations. Further refinement of the SOC scale is therefore warranted.
一个人的应对能力（SOC）反映了他们对世界有意义和可预测的感知，并影响他们以促进健康的方式应对压力源的能力。需要有一种有效的、可靠的和敏感的 SOC 测量方法，以基于这一概念推进健康促进研究。13 项应对能力量表（SOC-13）被广泛使用，但我们之前的评估报告表明，当用于病态肥胖的成年人时，其具有心理测量学上的局限性。为了确定这些局限性是否特定于该人群，或者也适用于其他人群，我们在新的炎症性肠病（IBD）成年人样本中复制了我们之前的研究设计和分析。
2009 年 10 月 1 日至 2011 年 5 月 31 日期间，挪威的一个常规诊所就诊时，428 名 IBD 成年人完成了 SOC-13 量表的评估。使用 Rasch 分析方法，根据评分量表功能、内部量表有效性、个体反应有效性、个体分离可靠性和不同项目功能对 SOC-13 及其三个分量表进行了评估。
将 7 类别评分量表低端的类别进行合并，可改善其整体功能。有两个项目不符合 Rasch 模型的要求，将它们从量表中删除后，剩余的 11 项量表（SOC-11）具有可接受的项目拟合度。然而，SOC-13 和 SOC-11 均不符合单维性或个体反应有效性的标准。SOC-13 和 SOC-11 都能够区分三种 SOC 组，但没有一个子量表能够区分任何这样的组。观察到与人口统计学特征相关的最小的差异项目功能。
在 IBD 成年人中，应对能力量表的 11 项版本具有比原始 13 项版本更好的心理测量学特性。这些发现与我们之前在病态肥胖成年人中的评估结果相似，表明所确定的局限性可能存在于不同人群中。因此，需要进一步完善 SOC 量表。
