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On estimating the difference limen in duration discrimination tasks: A comparison of the 2AFC and the reminder task

机译：在估计持续时间歧视任务中的差异时：2AFC和提醒任务的比较

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This article assesses whether the two-alternative forced-choice (2AFC) and the reminder tasks (i.e., method of constant stimuli) yield identical estimates of the difference limen (DL). In a series of six experiments, participants discriminated between two duration stimuli. Experiments 1-5 employed auditory stimuli, and Experiment 6 employed visual stimuli. Experiments 1 and 2 combined each of the two tasks with an adaptive and a nonadaptive procedure for threshold estimation. Experiment 3 varied the distribution of the comparison levels, whereas Experiment 4 employed random interstimulus intervals. Experiments 5 and 6 examined the influence of the presentation order of the standard and comparison stimuli. Results indicate that both the adaptive and the nonadaptive procedures yield virtually identical DL estimates; yet, the 2AFC task produces consistently larger DLs than does the reminder task. In addition, DL increases when the standard occurs in the second rather than in the first stimulus position. In order to account for these results, we assume that participants use an internal standard instead of the actually presented standard as a reference for their judgment.
机译：本文评估了两种选择的强制选择（2AFC）和提醒任务（即恒定刺激方法）是否产生相同的估计值（DL）。在一系列的六个实验中，参与者区分了两个持续时间刺激。实验1-5采用听觉刺激，而实验6采用视觉刺激。实验1和2将两个任务分别与自适应和非自适应过程相结合，用于阈值估计。实验3改变了比较水平的分布，而实验4则采用了随机的刺激间隔。实验5和6检验了标准表示顺序和比较刺激的影响。结果表明，自适应程序和非自适应程序均产生几乎相同的DL估计值。但是，与提醒任务相比，2AFC任务产生的DL始终更大。另外，当标准发生在第二刺激位置而不是第一刺激位置时，DL增加。为了解释这些结果，我们假设参与者使用内部标准代替实际提出的标准作为判断的参考。

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