On the choice of adequate randomization ranges for limiting the use of unwanted cues in same-different, dual-pair, and oddity tasks.
On the choice of adequate randomization ranges for limiting the use of unwanted cues in same-different, dual-pair, and oddity tasks.
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DOI：
10.3758/app.72.2.538
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发表时间：
2010-02
期刊：
影响因子：
--
通讯作者：
Micheyl C
中科院分区：
文献类型：
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作者：
Dai H;Micheyl C
在设计心理物理实验时，一个主要的问题是参与者可能会使用另一个刺激特征（“线索”），而不是实验者所打算的。避免这种情况的一种方法是将随机变化应用于刺激呈现的相应特征，使“不想要的”线索不可靠。使用这种随机化（“漫游”）技术的实验者面临的一个重要问题是：随机化范围应该有多大才能确保参与者不能通过使用不想要的线索达到一定比例的正确率（PC），同时避免随机化对任务表现的不必要干扰？以前的出版物提供了在是-否和多选项、强迫选择任务中选择适当随机化范围的公式。在本文中，我们提供了图表和表格，可用于选择更适合于涉及相同-不同，双对或奇怪任务的实验的随机化范围。
A major concern when designing a psychophysical experiment is that participants may use another stimulus feature (“cue”) than that intended by the experimenter. One way to avoid this involves applying random variations to the corresponding feature across stimulus presentations, to make the “unwanted” cue unreliable. An important question facing experimenters who use this randomization (“roving”) technique is: How large should the randomization range be to ensure that participants cannot achieve a certain proportion correct (PC) by using the unwanted cue, while at the same time avoiding unnecessary interference of the randomization with task performance? Previous publications have provided formulas for the selection of adequate randomization ranges in yes-no and multiple-alternative, forced-choice tasks. In this article, we provide figures and tables, which can be used to select randomization ranges that are better suited to experiments involving a same-different, dual-pair, or oddity task.