This study provides an example of using single case experimental design to guide data-driven, low-inference interventions for an individual using customized displays on a speech-generating device and can serve as an example for interventionists who need to compare intervention strategies to identify approaches that are most appropriate for a specific learner. This study compared the performance of locating vocabulary in embedded and non-embedded visual scene displays (VSDs) on a speech-generating device by one 19-year-old male diagnosed with autism spectrum disorder. A single case experimental alternating treatment design was applied and the participant was taught to locate 48 vocabulary items that were equally divided among eight VSDs (i.e. four embedded and four non-embedded VSDs, each containing six vocabulary items). Accuracy and latency data for locating target VSDs and vocabulary items were measured over 12 intervention sessions and one maintenance session. Results show that the participant was initially more accurate and faster in locating vocabulary among embedded VSDs, when compared to non-embedded VSDs. However, over the course of 12 intervention sessions and the maintenance session, his performance became similar among both embedded and non-embedded VSDs. Implications regarding the clinical utility of the single case alternating treatment design and limitations are discussed.

中文翻译：

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比较一位被诊断患有自闭症谱系障碍的成年人的嵌入式和非嵌入式视觉场景显示：单例设计的临床应用

本研究提供了一个示例，该示例使用单个案例实验设计来指导使用语音生成设备上的定制显示的个人进行数据驱动的低推理干预，并且可以作为需要比较干预策略以识别方法的干预者的示例最适合特定学习者。本研究比较了一名 19 岁被诊断患有自闭症谱系障碍的男性在语音生成设备上的嵌入式和非嵌入式视觉场景显示 (VSD) 中定位词汇的性能。应用了单例实验交替治疗设计，并教导参与者定位 48 个词汇项目，这些词汇项目均分在八个 VSD（即四个嵌入式和四个非嵌入式 VSD，每个包含六个词汇项目）。用于定位目标 VSD 和词汇项目的准确性和延迟数据在 12 个干预会话和 1 个维护会话中进行了测量。结果表明，与非嵌入式 VSD 相比，参与者最初在嵌入式 VSD 中定位词汇时更准确、更快。然而，在 12 次干预会话和维护会话的过程中，他在嵌入式和非嵌入式 VSD 中的表现变得相似。讨论了单病例交替治疗设计的临床效用和局限性的影响。在 12 次干预和维护期间，他在嵌入式和非嵌入式 VSD 中的表现变得相似。讨论了单病例交替治疗设计的临床效用和局限性的影响。在 12 次干预和维护期间，他在嵌入式和非嵌入式 VSD 中的表现变得相似。讨论了单病例交替治疗设计的临床效用和局限性的影响。