Yawning, acute stressors, and arousal reduction in Nazca booby adults and nestlings

  title={Yawning, acute stressors, and arousal reduction in Nazca booby adults and nestlings},
  author={Amy C. Liang and Jacquelyn K Grace and Emily M. Tompkins and David J. Anderson},
  journal={Physiology & Behavior},
Yawning is a familiar and phylogenetically widespread phenomenon, but no consensus exists regarding its functional significance. We tested the hypothesis that yawning communicates to others a transition from a state of physiological and/or psychological arousal (for example, due to action of a stressor) to a more relaxed state. This arousal reduction hypothesis predicts little yawning during arousal and more yawning (above baseline) during and after down-regulation of arousal. Experimental… CONTINUE READING
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