Wacker D, McMahon C, Steege M, Berg W, Sasso G, Melloy K
J Appl Behav Anal. 1990 Fall;23(3):333-9. doi: 10.1901/jaba.1990.23-333.
We propose the use of a combined version of the alternating treatments and multiple baseline designs in situations in which a traditional baseline (no treatment) condition either does not provide an adequate contrast condition or is not feasible or practical due to clinical constraints. We refer to this design as a sequential alternating treatments design because two treatments are initially implemented in a random or counterbalanced fashion and are followed by a sequential change in one or both treatments across settings, subjects, or tasks. The effects of the independent variables are assessed first by analyzing the two series of data points representing the different treatments (relative effects) and then by assessing changes in one or both series, as application of the alternative treatment is introduced sequentially. The sequential application of treatment provides an analysis of control in the same manner as the multiple baseline design; the initial alternating treatments phase provides a contrast condition in much the same manner as a baseline condition. Applications of this design to the assessment of peer training and self-injurious behavior are described.
我们建议，在传统基线（无治疗）条件无法提供充分的对照条件，或由于临床限制而不可行或不实际的情况下，采用交替治疗和多基线设计的组合版本。我们将这种设计称为序贯交替治疗设计，因为最初以随机或平衡的方式实施两种治疗，随后在不同的环境、受试者或任务中对一种或两种治疗进行序贯改变。首先通过分析代表不同治疗的两组数据点（相对效应）来评估自变量的效应，然后在依次引入替代治疗时，通过评估一组或两组数据的变化来进行评估。治疗的序贯应用与多基线设计一样提供了对照分析；最初的交替治疗阶段与基线条件一样提供了对照条件。本文描述了该设计在同伴训练评估和自伤行为评估中的应用。
