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Generalization of learned pain modulation depends on explicit learning.

Leonie Koban1, Daniel Kusko1, Tor D Wager1

  • 1Department of Psychology and Neuroscience, University of Colorado Boulder, United States; Institute of Cognitive Science, University of Colorado Boulder, United States.

Acta Psychologica
|October 14, 2017
PubMed
Summary
This summary is machine-generated.

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Learned pain modulation generalizes to similar cues. Conscious expectations drive this generalization, influencing pain perception and potentially placebo/nocebo effects.

Area of Science:

  • Neuroscience
  • Psychology
  • Pain Research

Background:

  • Pain perception is significantly modulated by contextual and socio-affective factors.
  • Learned associations between cues and pain intensity influence subsequent pain experiences.

Purpose of the Study:

  • To investigate the generalization of learned pain modulation to perceptually and conceptually similar cues.
  • To examine the role of conscious expectations in this generalization effect.

Main Methods:

  • Three studies involving 134 participants were conducted.
  • Participants underwent heat stimulation preceded by conditioned stimuli (CSHIGH/CSLOW) and novel similar cues.
  • Individual differences in learned expectations were assessed and correlated with pain reports.
Keywords:
ConceptualConditioningGeneralizationInstructionLearningPainPlacebo effect

Related Experiment Videos

Main Results:

  • Participants reported higher pain intensity when stimuli were perceptually or conceptually similar to CSHIGH.
  • The generalization of learned pain modulation was observed for both types of similar cues.
  • The strength of generalization strongly correlated with individual differences in explicit expectations.

Conclusions:

  • Learned pain modulation generalizes to novel, similar cues based on perceptual and conceptual similarity.
  • Conscious expectations and higher-order conceptual inference play a crucial role in the generalization of learned pain modulation.
  • Findings have implications for understanding placebo/nocebo effects, chronic pain, and anxiety.