Melbourne School of Psychological Sciences, The University of Melbourne, Parkville, Victoria, Australia.
PLoS One. 2012;7(8):e43796. doi: 10.1371/journal.pone.0043796. Epub 2012 Aug 28.
In everyday life, we often need to attentively track moving objects. A previous study has claimed that this tracking occurs independently in the left and right visual hemifields (Alvarez & Cavanagh, 2005, Psychological Science,16, 637-647). Specifically, it was shown that observers were much more accurate at tracking objects that were spread over both visual hemifields as opposed to when all were confined to a single visual hemifield. In that study, observers were not required to remember the identities of the objects. Conversely, in real life, there is seldom any benefit to tracking an object unless you can also recall its identity. It has been predicted that when observers are required to remember the identities of the tracked objects a bilateral advantage should no longer be observed (Oksama & Hyönä, 2008, Cognitive Psychology, 56, 237-283). We tested this prediction and found that a bilateral advantage still occurred, though it was not as strong as when observers were not required to remember the identities of the targets. Even in the later case we found that tracking was not completely independent in the two visual hemifields. We present a combined model of multiple object tracking and multiple identity tracking that can explain our data.
在日常生活中，我们经常需要专注地跟踪移动的物体。先前的一项研究声称，这种跟踪在左右视觉半视野中是独立发生的（Alvarez 和 Cavanagh，2005，《心理科学》，16，637-647）。具体来说，研究表明，观察者在跟踪分布在两个视觉半视野中的物体时，比所有物体都局限在单个视觉半视野时要准确得多。在该研究中，观察者不需要记住物体的身份。相反，在现实生活中，除非你能回忆起物体的身份，否则跟踪物体几乎没有任何好处。有人预测，如果要求观察者记住被跟踪物体的身份，就不再会观察到双侧优势（Oksama 和 Hyönä，2008，《认知心理学》，56，237-283）。我们检验了这一预测，发现虽然当观察者不需要记住目标的身份时，双侧优势仍然存在，但它不如不需要记住目标身份时那么强。即使在后一种情况下，我们发现跟踪在两个视觉半视野中也不是完全独立的。我们提出了一个多物体跟踪和多身份跟踪的综合模型，可以解释我们的数据。
