客体运动方向的视觉工作记忆存储方式

采用变化觉察范式，以独立运动的客体为对象，通过两个实验，探讨多个客体的运动方向在视觉工作记忆中的存储机制，即单个对象独立存储，抑或其存储受多个客体构型的影响。实验一和实验二相继考察了非目标客体运动方向变化，以及是否存在非目标客体对觉察目标客体运动方向的影响。结果发现，非目标客体运动方向变化条件下的觉察正确率显著低于不变的条件，然而只呈现目标客体条件下的觉察正确率与同时呈现目标和非目标条件无显著差异。该结果与前人在静态条件下对目标客体的觉察受目标客体和非目标客体整体构型影响的结论不一致。本研究的结果支持多个客体的运动方向信息在工作记忆中是以独立方式存储的假设。

The Storage Mechanism of Motion Direction for Objects in Visual Working Memory

Applying the change detection paradigm,with individual moving objects as the stimuli,the present research explored the storage mechanism of moving objects in visual working memory,viz.stored individually or influenced by the multi-object configuration.Two experiments were conducted to investigate the impact on the change detection of non-target direction change(exp 1) and w/o the existence of non-targets(exp 2).The results indicated that the change detection rate was significantly lower in the maximal change condition versus the minimal change condition;however,there was no significant difference in the change detection rate between single probe and minimal change.The results were consistent with previous studies which were conducted under static scenes.The research supported the hypothesis that multiple directions of moving objects are stored independently in VWM.