Evidence for rapid extraction of average size in RSVP displays of circles
Evidence for rapid extraction of average size in RSVP displays of circles
复制标题
在 RSVP 显示的圆圈中快速提取平均大小的证据
DOI：
10.1167/8.6.13
复制
发表时间：
2010
影响因子：
1.8
通讯作者：
Jennifer E. Corbett
中科院分区：
文献类型：
--
作者：
Chris Oriet;Jennifer E. Corbett
为了减少冗余信息，视觉系统可以创建集合的统计表示，丢弃关于单个项目的信息。Ariely（2001）发现，观察者不能可靠地确定一个测试圆是否出现在一组之前立即呈现的圆中，但可以确定它是否对应于该组的平均大小。在这里，我们调查是否在一个快速的序列中呈现的一组圆圈的平均大小是统计表示。在实验1中，一个RSVP显示的圆圈，然后是一个测试圈，观察员确定是否测试圈是平均值或一个成员的集合。观察者可以确定平均大小，但无法识别单个圆圈。此外，随着目标值和平均值之间的尺寸差异减小，测试圆被错误地识别为平均值，频率增加。为了确定是否执行的平均识别任务耗尽中央注意力资源需要进行并发处理，在实验2中观察者要么流的圆圈（和确定的平均值），其次是流的形状，或与一个单一的圆圈内的流的形状（和确定的大小的圆圈）。目标形状在五个滞后中的一个处跟随圆。形状识别是更好的，在短滞后以下的平均任务相比，单圈任务。此外，形状识别是滞后依赖于单圈任务（注意眨眼;雷蒙德，夏皮罗，和阿内尔，1992），但不受滞后的平均判断任务。这表明，识别一个圆圈，但不判断集合的平均值，耗尽了执行后续形状任务所需的中央注意力资源。我们的结论是，快速平均顺序呈现的显示器是由一个有效的，可能是不可避免的过程，不需要中央注意力资源。
To reduce redundant information, the visual system may create statistical representations of sets, discarding information about individual items. Ariely (2001) found that observers could not reliably determine whether a test circle appeared in a set of circles presented immediately beforehand, but could determine whether it corresponded to the mean size of the set. Here we investigate whether the average size of a set of circles presented in a rapid sequence is statistically represented. In Experiment 1, an RSVP display of circles was followed by a test circle, and observers determined whether the test circle was the mean or a member of the set. Observers could determine average size, but could not identify individual circles. Furthermore, the test circle was erroneously identified as the mean with increasing frequency as the difference in size between the target and mean decreased. To determine whether performing the mean identification task depleted central attentional resources needed to perform concurrent processing, in Experiment 2 observers were presented either with a stream of circles (and identified the mean) followed by a stream of shapes, or with a single circle within a stream of shapes (and identified the size of the circle). The target shape followed the circle (s) at one of five lags. Shape identification was better at short lags following the mean task compared to the single circle task. Further, shape identification was lag-dependent following the single circle task (an attentional blink; Raymond, Shapiro, & Arnell, 1992), but unaffected by lag following the mean judgment task. This suggests that identifying a single circle, but not judging the mean of the set, depleted central attentional resources necessary to perform the subsequent shape task. We conclude that rapid averaging over sequentially presented displays is accomplished by an efficient, possibly unavoidable process, that does not require central attentional resources.