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Control over speeded actions: a common processing locus for micro- and macro-trade-offs?

Ines Jentzsch1, Hartmut Leuthold

  • 1School of Psychology, University of St Andrews, UK. ij7@st-andrews.ac.uk

Quarterly Journal of Experimental Psychology (2006)
|July 19, 2006
PubMed
Summary

Cognitive control mechanisms for long- and short-term behavioral adjustments likely share a common motor processing locus. This finding emerged from studying speed-accuracy trade-offs and post-error slowing in a reaction time task.

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Area of Science:

  • Cognitive Psychology
  • Neuroscience
  • Human Behavior

Background:

  • Cognitive control involves adjusting behavior based on speed-accuracy trade-offs.
  • The neural locus of these adjustments within stimulus-response processing remains debated.
  • Micro-trade-offs (e.g., post-error slowing) and macro-trade-offs (instruction-based) are key phenomena.

Purpose of the Study:

  • To investigate whether mechanisms for short-term (micro) and long-term (macro) behavioral adjustments share a common processing locus.
  • To examine the interplay between speed-accuracy instructions, spatial compatibility, and post-error slowing.

Main Methods:

  • Participants performed a two-choice reaction time (RT) task with spatial compatibility variations.
  • A speed-accuracy instruction manipulated macro-trade-offs.

Related Experiment Videos

  • Post-error slowing in RT was used to assess micro-trade-offs.

    • Main Results:

    • Significant variations in RT and error rates were observed due to micro- and macro-trade-offs, and spatial compatibility.
    • Post-error slowing was amplified under accuracy-focused instructions, irrespective of spatial compatibility.
    • These effects were most pronounced for response alternations.

    Conclusions:

    • Findings suggest a common locus for micro- and macro-trade-off mechanisms at the motor processing level.
    • Macro-trade-offs may also involve premotoric processing influences.
    • This research clarifies the neural underpinnings of cognitive control and behavioral adaptation.