Department of Psychology, Stony Brook University, Stony Brook, NY 11794-2500, USA.
Mem Cognit. 2011 May;39(4):600-13. doi: 10.3758/s13421-010-0048-x.
Do refixations serve a rehearsal function in visual working memory (VWM)? We analyzed refixations from observers freely viewing multiobject scenes. An eyetracker was used to limit the viewing of a scene to a specified number of objects fixated after the target (intervening objects), followed by a four-alternative forced choice recognition test. Results showed that the probability of target refixation increased with the number of fixated intervening objects, and these refixations produced a 16% accuracy benefit over the first five intervening-object conditions. Additionally, refixations most frequently occurred after fixations on only one to two other objects, regardless of the intervening-object condition. These behaviors could not be explained by random or minimally constrained computational models; a VWM component was required to completely describe these data. We explain these findings in terms of a monitor-refixate rehearsal system: The activations of object representations in VWM are monitored, with refixations occurring when these activations decrease suddenly.
注视回跳是否在视觉工作记忆（VWM）中起排练作用？我们分析了自由观看多目标场景的观察者的注视回跳。眼动仪用于限制对场景的观察，在目标（干预对象）之后仅注视指定数量的对象，然后进行四项选择强制识别测试。结果表明，目标注视回跳的概率随着注视的干预对象数量的增加而增加，并且这些回跳比前五个干预对象条件的准确率高出 16%。此外，无论干预对象的条件如何，注视回跳最常发生在仅注视一到两个其他对象之后。这些行为不能用随机或最小约束的计算模型来解释；需要一个 VWM 组件来完全描述这些数据。我们根据监测-注视回跳再排练系统来解释这些发现：VWM 中的对象表示的激活被监测，当这些激活突然下降时，就会发生注视回跳。
