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Area of Science:

  • Cognitive Psychology
  • Neuroscience

Background:

  • Cognitive flexibility allows adaptation to changing task demands.
  • The list-wide switch probability (LWSP) effect demonstrates upregulated cognitive flexibility.
  • A concurrent activation mechanism proposes simultaneous task rule availability in working memory.

Purpose of the Study:

  • To investigate the task specificity of LWSP effects.
  • To determine if concurrent working memory load impacts LWSP effects.
  • To test the concurrent activation account of upregulated cognitive flexibility.

Main Methods:

  • Four experiments were conducted using task switching paradigms.
  • Experiment 1 replicated and extended previous LWSP findings.
  • Experiments 2-4 manipulated task novelty and working memory load.

Main Results:

  • LWSP effects generalize to the same task sets but not novel tasks.
  • Increased working memory load significantly reduced the LWSP effect.
  • Performance and voluntary switch rates were modulated by LWSP.

Conclusions:

  • Findings support the concurrent activation hypothesis for LWSP effects.
  • LWSP-induced cognitive flexibility is task-specific.
  • Concurrent working memory load interferes with this mechanism, requiring further investigation.