Thesis

Quantities of reinforcement and its effect on resurgence in pigeons

Four experimentally naïve King Hubbard pigeons were used in order to determine the effect that quantities of reinforcement would have on resurgence. An ABCDBC design was implemented, and the pigeons were provided reinforcement in the form of food pellets for 3-sec or 6-sec for either left or right key pecks. In phase 1, B1 (left or right key pecks) was reinforced for either 3-sec or 6-sec. In phase 2, B1 was placed on extinction and B2 (pecks to the opposite key) was reinforced for 3-sec for all pigeons. In phase 3, B1 and B2 were placed on extinction. In phase 4, pigeons who were initially reinforced for 3-sec for B1 were reinforced for 6-sec and vice verse. Phase 5 was identical to phase 2; B1 was on extinction and B2 was reinforced for 3-sec for all pigeons. Phase 6 was identical to phase 3; B1 and B2 were placed on extinction. Resurgence was observed in both extinction phases, evidenced by higher levels of B1 responding in the respective resurgence phase compared to the previous phase where B1 was on extinction. After comparing both extinction phases, it was determined that quantities of reinforcement did not have an effect on resurgence. Keywords: resurgence, quantities, reinforcementprovided reinforcement in the form of food pellets for 3-sec or 6-sec for either left or right key pecks. In phase 1, B1 (left or right key pecks) was reinforced for either 3-sec or 6-sec. In phase 2, B1 was placed on extinction and B2 (pecks to the opposite key) was reinforced for 3-sec for all pigeons. In phase 3, B1 and B2 were placed on extinction. In phase 4, pigeons who were initially reinforced for 3-sec for B1 were reinforced for 6-sec and vice verse. Phase 5 was identical to phase 2; B1 was on extinction and B2 was reinforced for 3-sec for all pigeons. Phase 6 was identical to phase 3; B1 and B2 were placed on extinction. Resurgence was observed in both extinction phases, evidenced by higher levels of B1 responding in the respective resurgence phase compared to the previous phase where B1 was on extinction. After comparing both extinction phases, it was determined that quantities of reinforcement did not have an effect on resurgence._x000D_ Keywords: resurgence, quantities, reinforcement

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