Single-case research designs (SCRDs) are rigorous methods used to investigate the effects of interventions on socially important outcomes. A hallmark of SCRDs is repeated measurement of observable behavior presented in time-series graphs. The construction of time-series graphs can inflate Type I or Type II errors made via visual analysis. In the current investigation, we included all SCRDs published in four flagship journals in the field of learning disabilities (Journal of Learning Disabilities, Learning Disabilities Quarterly, Learning Disabilities Research & Practice, Journal of Learning Disabilities: A Contemporary Journal) over the last decade. A total of 47 studies including 315 graphs were included. Our findings suggest that ordinate scaling was appropriate across a majority of graphs; graphs, however, did not adhere to recommendations for x:y ratio or DPPXYR.

中文翻译：

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学习障碍领域单例图构建十年回顾

单一案例研究设计 (SCRD) 是用于调查干预措施对社会重要结果的影响的严格方法。SCRD 的一个标志是对时间序列图中可观察行为的重复测量。时间序列图的构建可以夸大通过视觉分析得出的 I 类或 II 类错误。在当前的调查中，我们纳入了在学习障碍领域的四个旗舰期刊（学习障碍杂志、学习障碍季刊、学习障碍研究与实践、学习障碍杂志：当代期刊）上发表的所有 SCRD） 在过去十年中。共纳入 47 项研究，包括 315 张图表。我们的研究结果表明，纵坐标缩放适用于大多数图表；然而，图表不符合x : y比率或 DPXYR 的建议。