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Trait anxiety and post-learning stress do not affect perceptual learning.

Kristoffer C Aberg1, Aaron M Clarke, Carmen Sandi

  • 1Laboratory of Psychophysics, Brain Mind Institute, École Polytechnique Fédérale de Lausanne, Switzerland. kc.aberg@gmail.com

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Summary

Post-learning stress does not impact non-declarative perceptual learning. This study found no significant differences in visual texture discrimination task improvements after high or low stressor exposure, regardless of trait anxiety.

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Area of Science:

  • Cognitive psychology
  • Neuroscience
  • Stress research

Background:

  • Stress is known to affect declarative learning.
  • The impact of stress on non-declarative learning, such as perceptual learning, is less understood.
  • Previous research suggests trait anxiety may influence perception under stress.

Purpose of the Study:

  • To investigate the effect of post-learning stress on perceptual learning.
  • To examine if stress modulates performance on a visual texture discrimination task (TDT).
  • To determine if trait anxiety influences the response to stress in perceptual learning.

Main Methods:

  • Participants trained on the TDT on day one.
  • Exposure to either a high stressor (Cold Pressor Test) or a low stressor occurred post-learning.
  • Performance on the TDT was reassessed on day two to measure learning improvements.

Main Results:

  • Elevated cortisol levels were observed only in the high stressor group.
  • No significant differences in TDT learning improvements were found between the high and low stressor groups.
  • Trait anxiety did not modulate performance or stress responsiveness in this task.

Conclusions:

  • Post-learning stress does not appear to modulate non-declarative perceptual learning.
  • The findings do not support a significant role for stress in learning visual discrimination skills.
  • Trait anxiety does not seem to be a critical factor in stress-related modulation of this type of learning.