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Measuring cognitive effort without difficulty.

Hugo Fleming1,2, Oliver J Robinson3, Jonathan P Roiser3

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Summary
This summary is machine-generated.

Individual differences in cognitive effort sensitivity are key, but current measures confound effort with difficulty. A new Number Switching Task (NST) separates these, allowing clearer research into effort costs and conditions like depression.

Keywords:
AnhedoniaCognitive effortComputational psychiatryDepressionIndividual differencesNew measures

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Psychopathology

Background:

  • Individual differences in sensitivity to cognitive effort costs exist.
  • This sensitivity may explain cognitive variations in conditions like depression and schizophrenia.
  • Existing measures confound cognitive effort with task difficulty.

Purpose of the Study:

  • To address the confounding of effort and difficulty in cognitive effort research.
  • To introduce a novel task, the Number Switching Task (NST), to disentangle effort and difficulty.
  • To provide a standardized measure for assessing individual differences in effort costs.

Main Methods:

  • Development and validation of the Number Switching Task (NST).
  • Administration of the NST to a large, online participant sample.
  • Utilizing Bayesian modeling to derive behavioral parameters from task performance.

Main Results:

  • The NST successfully separates cognitive effort from task difficulty.
  • Classic effort discounting effects were replicated using the NST.
  • Behavioral parameters derived from the NST showed preliminary associations with the Need for Cognition scale.

Conclusions:

  • The Number Switching Task (NST) offers a validated method to measure cognitive effort costs independently of difficulty.
  • This advancement facilitates more precise research into the role of effort sensitivity in cognition and psychopathology.
  • The NST and its associated Bayesian modeling approach provide a robust platform for future investigations into individual differences in cognitive effort.