시각작업기억에 표상된 시공간적 맥락 정보가 변화탐지 과정에 미치는 영향

초록

According to the hypothesis of integrated representations in visual working memory (VWM; Luck & Vogel, 1997), the present study tested if spatio-temporal contextual information in VWM can affect change detection performance. In Experiments, sample items were displayed either at fixed positions that would be easily organized into two distinctive groups or otherwise at random positions that would be difficult for such spatial organization. For the purpose of examining how the selection demand on the spatio-temporal information of the sample items affect change detection accuracy, the test items were displayed in a way that either every sample items (e.g., whole probe) or only a subset of the sample (e.g., partial probe) were displayed. We also examined the accuracy of participants’ responses when determining the membership of a change across two separate groups of test items. We found that change detection was more accurate in the fixed-position condition than the random-position condition except relatively lower accuracy under the partial probe, and the membership determination responses were fairly accurate. The results indicate that the selective access to spatio-temporal information that are accurately represented in VWM in an integrated fashion can lead to indiscriminate retrieval of memory items and consequently can cause a potential interference against VWM performance.

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