Abstract
The inhibition of exploratory behavior, and responses to the CS were used as measures of conditioned fear in young rats. Comparisons with control groups indicate that any experience with shock produces equal amounts of fear retention in the early and middle stages of extinction. The differential effects produced by the various procedures became apparent only later in extinction when the group that had experienced CS-US pairings in acquisition exhibited significantly more residual fear than the controls on both response measures.
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Atrens, D.M., Bronstein, P.M. Conditioned inhibition of exploration in young rats. Psychon Sci 12, 309–310 (1968). https://doi.org/10.3758/BF03331324
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DOI: https://doi.org/10.3758/BF03331324