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Pubmed for Handhelds

PUBMED FOR HANDHELDS

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  • Title: Is bar-holding with negative reinforcement preparatory or perseverative.
    Author: Keehn JD.
    Journal: J Exp Anal Behav; 1967 Sep; 10(5):461-5. PubMed ID: 6050058.
    Abstract:
    Three of four white rats learned to press first one bar and then another to escape or avoid electric shocks. Cumulative bar-holding-time records showed that holding occurred frequently on the second bar but hardly ever on the first, indicating that bar-holding is more "perserverative" than "preparatory". The response chain, first-bar press second-bar press, was more easily established by a forward than by a backward chaining procedure.
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