Reminders - 1 Reminders In their original study Campbell...

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3/22/07 1. Reminders In their original study, Campbell and Campbell (1962) had found that infant rats remembered increasingly longer with age, but even the oldest rat pups did not remember long enough for their earlier experience to have an enduring effect on their later behavior— particularly after a substantial period of development. Campbell and Jaynes (1966) hypothesized that reinstatement was the means by which infants’ early memories are maintained over a major developmental period. The principle underlying reinstatement is simple: As a memory wanes, intermittent exposure to the original event keeps the memory ”alive”—like periodically throwing a new log on a fire to keep it from dying out. In a seminal experiment, they tested the hypothesis that periodic reinstatement maintains infants’ memory of fear conditioning for a relatively long period. They gave rat pups 30 shocks (the unconditional stimulus, or US) in the black compartment (the conditioned stimulus, or CS) of a black-and-white shuttle box and then exposed them to a single CS–US pairing (the reinstatement) each week for the next 3 weeks. When pups were tested for retention of conditioned fear 1 month after original training, they still exhibited the conditioned fear. Control groups given either the original fear conditioning without any reinstatements or the reinstatements without the original fear conditioning exhibited no fear
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Reminders - 1 Reminders In their original study Campbell...

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