Mechanisms responsible for reduced contextual conditioning with massed unsignaled unconditional stimuli.

@article{Fanselow1993MechanismsRF,
  title={Mechanisms responsible for reduced contextual conditioning with massed unsignaled unconditional stimuli.},
  author={Michael S Fanselow and Joseph P DeCola and Shawn Young},
  journal={Journal of experimental psychology. Animal behavior processes},
  year={1993},
  volume={19 2},
  pages={121-37}
}
Massed presentation of unsignaled shock results in less conditional freezing to contextual cues than do distributed presentations. Consistent with an account of the learning deficit based on the perceptual-defensive-recuperative theory, the massed-shock deficit was attenuated by preexposure to shock or the conditioning context. This formulation was also successfully applied to the deficit in conditioning that occurs when a single shock is given immediately after placement in a context. Opponent… CONTINUE READING

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