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The task-relevant attribute representation can mediate the Simon effect.

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  • 1Key Laboratory of Cognition and Personality (Ministry of Education) and School of Psychology, Southwest University, Chongqing, China.

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|March 13, 2014
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Summary
This summary is machine-generated.

The Simon effect, a cognitive bias, is influenced by how task information is stored in working memory (WM). Verbal WM encoding of stimulus attributes reliably produces the Simon effect, unlike visual WM encoding.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human-Computer Interaction

Background:

  • The Simon task is a classic experimental paradigm used to study cognitive processes.
  • Previous research suggests a working memory (WM) account for spatial codes in cognitive tasks.
  • The influence of task-relevant attribute representation on the Simon effect remains an area of investigation.

Purpose of the Study:

  • To investigate how task-relevant attribute representation (verbal vs. visual) in working memory affects the Simon effect.
  • To determine if the nature of stimuli (between-category vs. within-category) influences the Simon effect.
  • To explore the role of verbal working memory encoding in the Simon effect.

Main Methods:

  • Three experiments were conducted using the Simon task paradigm.
  • Experiment 1: Compared Simon effect for between-category (verbal WM) and within-category (visual WM) color discrimination.
  • Experiment 2: Replicated Experiment 1 using shape discrimination (between-category vs. within-category).
  • Experiment 3: Assessed the Simon effect with varying task orders (between- vs. within-category) and analyzed response time distributions.

Main Results:

  • A reliable Simon effect was observed only in the between-category conditions across experiments.
  • The Simon effect was consistently found when subjects used verbal working memory (WM) encoding for stimulus attributes.
  • Response time distribution analysis indicated a decreased Simon effect with longer response times.

Conclusions:

  • The findings support the notion that the Simon effect is dependent on the verbal working memory (WM) representation of task-relevant stimulus attributes.
  • While consistent with temporal coding accounts, the results emphasize the significant role of verbal WM encoding.
  • The study highlights the interplay between stimulus categorization, working memory, and response inhibition in the Simon task.