Anxious responses to predictable and unpredictable aversive events.

@article{Grillon2004AnxiousRT,
  title={Anxious responses to predictable and unpredictable aversive events.},
  author={Christian Grillon and Johanna M P Baas and Shmuel Lissek and Kathryn Smith and Jean A. Milstein},
  journal={Behavioral neuroscience},
  year={2004},
  volume={118 5},
  pages={
          916-24
        }
}
Anxiety induced by 2 types of predictable and unpredictable aversive stimuli, an unpleasant shock or a less aversive airblast to the larynx, were investigated in a between-group design. Participants anticipated predictable (signaled) or unpredictable (not signaled) aversive events, or no aversive event. Unpredictable, relative to predictable, contexts potentiated the startle reflex in the shock group but not in the airblast group. These data suggest that unpredictability can lead to a sustained… Expand
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