Effect of Decision Load on Whole-Display Superiority in Change Detection

研究成果: 雜誌貢獻文章同行評審

5 引文 斯高帕斯(Scopus)


Visual short-term memory (VSTM) refers to our ability in remembering visual information for a limited amount of time. In the VSTM literature, mixed findings have been reported regarding whether items are encoded individually or globally in the context of other items. This study adopted a color change detection task and manipulated color and spatial relations of the items on display to test whether inter-item relational information and processing can facilitate change detection performance. Results showed that only when a post-cue was presented to reduce decision load (Experiments 1 and 3), both color and spatial relations facilitated color change detection. However, when there was no post-cue to lessen the decision load, preserving spatial relations at test impaired color change detection (Experiment 2). Furthermore, spatial and color relational processing interactively affected color change detection. Benefit of the spatial relations was observed only when color grouping cues can aid change detection, and the utilization of color relations was optimized when spatial relations were preserved to cue the retrieval of color relations. Our results support the hierarchical representation hypothesis, which assumes that both individual items and item relations are encoded and maintained in VSTM. The amount of cognitive resources for retrieving different levels of representations is highly constrained by the decision load.
頁(從 - 到)749-758
期刊Attention, Perception, and Psychophysics
出版狀態已發佈 - 4月 1 2015

ASJC Scopus subject areas

  • 實驗與認知心理學
  • 語言與語言學
  • 感覺系統
  • 語言和語言學


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