Department of Speech, Language, & Hearing Sciences, The University of Arizona, Tucson.
Am J Speech Lang Pathol. 2019 Aug 9;28(3):1233-1247. doi: 10.1044/2019_AJSLP-18-0285. Epub 2019 Jul 25.
Purpose When a behavioral treatment is generally efficacious, the central research questions shift to optimized dose delivery. In this study, we determine whether a validated treatment method can be made more effective or efficient by increasing the dose density employed. Method Twenty children were treated with Enhanced Conversational Recast methods to treat morphological errors. Half received 24 doses per session within a half hour (approximately 1 dose/1.25 min), and the other received the same number of doses within 15 min (approximately 1 dose/38 s). Generalization of morpheme use was probed throughout treatment and at a 6-week follow-up. Spontaneous use of treated morphemes was also tracked. Results Although the treatment was effective overall, there were no significant differences between treatment conditions on any of the outcome measures. Follow-up performance correlated significantly with performance at the end of the treatment period. Conclusion Minimal between-groups differences suggest that performance does not suffer when dose rates are compressed into half the time during treatment, making the high-density dose delivery method a more efficient delivery method. This could make time available within a treatment session to address other goals or allow for more classroom instructional time for the child. Supplemental Material https://doi.org/10.23641/asha.8968559.
目的 当行为治疗普遍有效时，核心研究问题转向优化剂量传递。在这项研究中，我们确定通过增加所使用的剂量密度是否可以使经过验证的治疗方法更有效或更高效。
方法 20 名儿童接受了增强型对话重铸方法治疗形态错误。一半人在半小时内接受 24 次治疗（大约每 1.25 分钟 1 次），另一半人在 15 分钟内接受相同数量的治疗（大约每 38 秒 1 次）。在整个治疗过程中和 6 周随访中，探究了语素使用的泛化情况。还跟踪了治疗语素的自发使用情况。
结果 尽管治疗总体上有效，但在任何结果测量上，治疗条件之间都没有显著差异。随访表现与治疗期末的表现显著相关。
结论 组间差异极小表明，当治疗期间将剂量率压缩到一半时，不会影响治疗效果，从而使高密度剂量传递方法成为更高效的传递方法。这可以在治疗期间为解决其他目标留出时间，或者为孩子提供更多的课堂教学时间。
