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Temporally massed CS presentations generate more fear extinction than spaced presentations
Christopher K Cain1, Ashley M Blouin, Mark Barad
1Interdepartmental Program in Neuroscience, University of California, Los Angeles, CA 90095-1761, USA.
Journal of Experimental Psychology. Animal Behavior Processes
|October 23, 2003
Summary
Temporally spaced training enhances fear acquisition, but massed training improves fear extinction in mice. Optimal fear extinction involves initial massed presentations followed by spaced ones.
Area of Science:
- Neuroscience
- Behavioral Psychology
- Learning and Memory
Background:
- Fear conditioning models human anxiety and excitatory learning.
- Fear extinction is a model for inhibitory learning and behavior therapy.
- Spaced training typically enhances learning, but its effect on extinction is unclear.
Purpose of the Study:
- To investigate if the rule of "temporally spaced training" applies to fear extinction in mice.
- To determine the optimal training schedule for effective fear extinction.
Main Methods:
- Utilized rodent fear conditioning models.
- Manipulated the temporal spacing of conditional stimulus (CS) presentations during extinction training.
- Assessed both short- and long-term fear extinction.
Main Results:
- Temporally massed CS presentations resulted in greater short- and long-term fear extinction.
- Once extinction learning was initiated by massed CS presentations, spaced CS presentations became more effective.
Conclusions:
- The general rule for learning (spaced training is better) does not directly apply to fear extinction.
- A modified approach involving initial massed CS presentations followed by spaced presentations optimizes fear extinction.