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Concurrent working memory load can reduce distraction.

So-Yeon Kim1, Min-Shik Kim, Marvin M Chun

  • 1Department of Psychology, Yonsei University, Seoul 120-749, Korea.

Proceedings of the National Academy of Sciences of the United States of America
|November 1, 2005
PubMed
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Concurrent working memory (WM) load impacts attentional control differently based on task overlap. Overlap with target processing increases distractibility, while overlap with distractor processing enhances executive control.

Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Attention

Background:

  • Multitasking is challenging, with working memory (WM) load often increasing distractibility.
  • The specific impact of WM load on attentional control may depend on the nature of the WM content and its overlap with task demands.

Purpose of the Study:

  • To investigate how concurrent working memory load affects performance on Stroop tasks, a measure of executive control.
  • To determine if the overlap between WM load content and task-relevant information (target vs. distractor processing) modulates Stroop interference.

Main Methods:

  • Three experiments were conducted using variations of the Stroop task.
  • Participants performed Stroop tasks while concurrently engaging in different types of working memory load.

Related Experiment Videos

Main Results:

  • Stroop interference increased when the WM load content overlapped with the information needed for target processing.
  • Conversely, Stroop interference decreased when the WM load content overlapped with distractor processing.

Conclusions:

  • Concurrent working memory load does not uniformly impair executive control; its effect is contingent on the overlap between WM content and task demands.
  • Dissociable components of working memory interact with perceptual processing and executive control mechanisms.