Introducing a control condition in the classic oddball paradigm: Oddballs are overestimated in duration not only because of their oddness
Introducing a control condition in the classic oddball paradigm: Oddballs are overestimated in duration not only because of their oddness
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DOI：
10.3758/s13414-015-0868-7
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发表时间：
2015-07-01
影响因子：
1.7
通讯作者：
Ulrich, Rolf
中科院分区：
文献类型：
--
作者：
Birngruber, Teresa;Schroeter, Hannes;Ulrich, Rolf
三项实验评估了参与者是否认为不频繁的刺激（奇怪）比频繁的刺激（标准）持续时间更长。经典的奇怪范例被修改，以便参与者判断目标刺激的持续时间，该目标刺激可以是标准的，也可以是奇怪的。目标始终是流中的第五个刺激，并且所有刺激都呈现在预定义的空间位置。这些修改使得能够直接比较古怪和标准的持续时间判断。在实验 1 和 2 中，不仅奇怪的持续时间而且标准的持续时间都被高估了几乎相同的量。换句话说，对怪人的高估并不是因为他们的怪异，而是反映了不同的时间膨胀，例如负时间顺序误差。在实验3中，所有刺激都出现在相同的空间位置。同样，怪人和标准都被高估了，但怪人更是如此。目前的结果强调了在评估真正的奇怪效应的大小时比较奇怪的判断持续时间和标准的重要性。此外，研究结果表明，时间奇怪效应的发生可能取决于刺激呈现的空间特征。
Three experiments assessed whether participants perceive infrequent stimuli (oddballs) to last longer than frequent ones (standards). The classical oddball paradigm was modified so that participants judged the duration of a target stimulus which could either be a standard or an oddball. The target was always the fifth stimulus in the stream and all stimuli were presented at predefined spatial positions. These modifications enabled a direct comparison of duration judgments for oddballs and standards. In Experiments 1 and 2 not only the duration of oddballs but also the duration of standards was overestimated by virtually the same amount. In other words, the overestimation of oddballs was not due to their oddness but reflected a different temporal dilation such as the negative time-order error. In Experiment 3, all stimuli were presented at the same spatial position. Again, both oddballs and standards were overestimated, however, oddballs more so. The present results highlight the importance of comparing the judged duration of oddballs and standards when evaluating the size of the genuine oddball effect. Furthermore, the findings suggest that the occurrence of temporal oddball effects can depend on spatial features of stimulus presentation.