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Florian Waszak1

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Cognitive control is challenged when switching tasks. Shorter task runs increase across-task priming, while longer runs reduce it, suggesting task set persistence influences performance.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Behavior

Background:

  • Humans form stimulus-action associations during task performance.
  • Prior task associations can interfere with current task performance, a phenomenon known as across-task priming.
  • This interference is hypothesized to stem from the persistence of the previous task's cognitive set.

Purpose of the Study:

  • To investigate the role of task set persistence in across-task priming.
  • To examine how the duration of task runs influences the magnitude of across-task priming.
  • To explore the implications for cognitive and mnemonic control mechanisms.

Main Methods:

  • Two experiments involving participants switching between two semantic classification tasks.
  • Experiment 1: Short runs of task switching.
  • Experiment 2: Longer runs of task switching.

Main Results:

  • Across-task priming was observed in both switch and repeat trials in Experiment 1 (short runs).
  • Across-task priming was significantly reduced on repeat trials in Experiment 2 (longer runs).
  • The degree of task set spillover from the previous task into repeat trials impacts observed priming effects.

Conclusions:

  • The persistence of task sets across task switches is a key factor in across-task priming.
  • Task run length modulates the impact of task set persistence on cognitive performance.
  • Findings inform our understanding of cognitive and mnemonic control strategies.