Several methods for assessing baseline performance in chained tasks have been outlined in the literature, including the fixed-opportunity probe (FOP) and the multiple-opportunity probe (MOP). Concerns have been raised regarding how each of these methods might change the baseline performance of a task, affecting the interpretation of experimental control. The purpose of the current study was to conduct a within-subject comparison of both the FOP and MOP procedures for children with autism performing daily living and self-care skills. Results indicated that, for most participants, the MOP resulted in elevated performance during baseline compared to the FOP, and that for some participants the MOP resulted in acquisition prior to direct training. Because of the possibility that the FOP might result in suppressed baseline performance, it is recommended that in most cases clinicians and researchers use the MOP when assessing baseline performance in chained tasks in order to obtain the most accurate data.

中文翻译：

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任务分析中基线程序的比较。

文献中概述了评估链式任务中基线性能的几种方法，包括固定机会探测（FOP）和多机会探测（MOP）。人们担心这些方法可能会改变任务的基线表现，从而影响实验控制的解释。本研究的目的是对具有日常生活和自理技能的自闭症儿童的 FOP 和 MOP 程序进行受试者内比较。结果表明，对于大多数参与者来说，与 FOP 相比，MOP 在基线期间提高了表现，并且对于一些参与者来说，MOP 导致在直接培训之前获得了成绩。由于 FOP 可能会导致基线性能受到抑制，因此建议在大多数情况下临床医生和研究人员在评估链式任务中的基线性能时使用 MOP，以获得最准确的数据。