Abstract:Information was sought on how the strength of fear, acquired and extinguished in a classical conditioning paradigm, might be affected by certain ofthe circumstances that normally are associated with the course of avoidance learning. Following preconditioning exposures to the conditioned stimulus, one group of rats (Group PRF) was given continuous conditioned stimulusunconditioned stimulus (CS-US) acquisition trials followed by stepwise reductions in US probability (given the CS) over three phases to about 11 %… Show more
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