关于在相同-不同、双对和奇偶数任务中选择适当的随机化范围以限制不必要线索的使用。
On the choice of adequate randomization ranges for limiting the use of unwanted cues in same-different, dual-pair, and oddity tasks.
作者信息
Dai Huanping, Micheyl Christophe
机构信息
University of Arizona, Tucson, Arizona 85721, USA.
出版信息
Atten Percept Psychophys. 2010 Feb;72(2):538-47. doi: 10.3758/APP.72.2.538.
Abstract
A major concern when designing a psychophysical experiment is that participants may use a stimulus feature (cue) other than that intended by the experimenter. One way to avoid this problem is to apply 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 the randomization range should be to ensure that the participants cannot achieve a certain proportion correct by using the unwanted cue, while at the same time avoiding unnecessary interference of the randomization with task performance. Previous researchers 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 that can be used to select randomization ranges that are better suited to experiments involving a same-different, dual-pair, or oddity task.
摘要
设计心理物理学实验时的一个主要问题是，参与者可能会使用实验者预期之外的刺激特征（线索）。避免这个问题的一种方法是在刺激呈现过程中对相应特征应用随机变化，以使不需要的线索不可靠。使用这种随机化（游动）技术的实验者面临的一个重要问题是，随机化范围应该多大，以确保参与者不能通过使用不需要的线索达到一定的正确比例，同时避免随机化对任务表现造成不必要的干扰。以前的研究人员已经给出了在是-否和多选项强制选择任务中选择适当随机化范围的公式。在本文中，我们提供了一些图表，可用于选择更适合涉及相同-不同、双对或奇异性任务的实验的随机化范围。
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