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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Decision-Making

Background:

  • Understanding the cognitive mechanisms underlying task switching and prediction is crucial for cognitive control research.
  • Previous studies suggest differences in how people handle task prediction based on instructions.
  • The role of explicit choice versus implicit guessing in modulating cognitive control requires further investigation.

Purpose of the Study:

  • To investigate the functional differences between 'guessing' and 'choosing' upcoming tasks on cognitive control.
  • To examine how the proportion of expected tasks influences switch costs under different prediction instructions.
  • To elucidate the underlying mechanisms driving observed differences in task switching performance.

Main Methods:

  • Replicated and extended previous findings on task prediction strategies.
  • Participants performed a task-switching paradigm with four distinct tasks.
  • Task predictions were instructed as either 'guessing' or 'choosing', with varying proportions of prediction conformity.

Main Results:

  • Under 'choosing' instructions, unexpected task outcomes affected switches and repetitions similarly, leaving switch costs unchanged.
  • Under 'guessing' instructions, switch costs were reduced, with task switches being less affected than repetitions.
  • This interaction between prediction type and switch costs was independent of the proportion of expected tasks.

Conclusions:

  • Explicit knowledge of denied choices in 'choosing' mitigates the impact of prediction-task mismatches.
  • Task unexpectedness in 'guessing' increases difficulty, which is compensated by enhanced cognitive control, reducing switch costs.
  • These findings highlight distinct cognitive control strategies employed when guessing versus choosing upcoming tasks.