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Evaluating Fidelity to the Wraparound Service Model for Youth: Application of Item Response Theory to the Wraparound Fidelity Index

机译：评估青少年环绕式服务模型的保真度：项目反应理论在环绕式保真度指数中的应用

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The wraparound process is a mechanism for multi-system planning and care coordination for youth with serious emotional and behavioral problems. Fidelity monitoring is critical to effective implementation of evidence-based practices in children’s mental health, as it helps ensure that complex interventions like wraparound are implemented as intended. The 40-item Wraparound Fidelity Index, version 4 (WFI-4; ) is the most frequently used measure of fidelity to the wraparound process, but analysis of its psychometric properties is insufficient. An item response theory approach, Rasch partial credit models for ordered polytomous data, was used on ratings from 1,234 facilitators, 1,006 caregivers, and 221 team members, focused on 1,478 youths (55% male). Results indicated the WFI-4 measured a unidimensional construct, with little evidence of item bias and good item and model fit. However, the item information curve was skewed, with most people endorsing high-fidelity responses, and several items had duplicative location estimates. A reduced 20-item measure is proposed. Internal reliability estimates for scores from this reduced measure were approximately equivalent to the longer measure. However, both versions would benefit from additional items located in the highest-fidelity area of either version of the scale where scores by greater than half of our sample fall, but only three items are located.
机译：环绕过程是针对患有严重情感和行为问题的年轻人进行多系统计划和护理协调的机制。保真度监控对于有效实施儿童心理健康中的循证实践至关重要，因为它有助于确保按计划实施复杂的干预措施，例如环绕疗法。 40个项目的环绕逼真度索引版本4（WFI-4;）是最常用的环绕逼真度度量，但是对其心理计量特性的分析不足。项目反应理论方法是有序多数据的Rasch部分信用模型，用于对1,234位促进者，1,006位看护者和221位团队成员的评分，重点关注1,478名青年（男性55％）。结果表明，WFI-4测量的是一维结构，几乎没有项目偏差的证据，并且项目和模型拟合良好。但是，商品信息曲线出现了偏差，大多数人都认可了高保真度响应，并且一些商品的位置估计值重复。建议减少20个项目。从减少的量度得出的分数的内部可靠性估计大约与较长的量度相当。但是，这两个版本都会受益于位于两个版本的最高保真度区域中的其他项，在这些项中，得分下降超过我们样本一半的分数，但是只有三个项位于。

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