Vulnerability of long-term memory to temporal delays in amphibians

Puddington, Martín Miguel; Papini, Mauricio R.; Muzio, Rubén N.

doi:10.1016/j.beproc.2013.05.010

Cited by 11 publications

(6 citation statements)

References 16 publications

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“…First, there was no evidence that overtraining affected retention of a runway response after a period of 8 days without training. Previous results had indicated that there was a magnitude of reinforcement effect on retention, with larger rewards resulting in better performance after an 8-day retention period (Puddington et al, 2013). In the present experiment, after 8 days without training, animals returned to the level of response they had at the end of acquisition even after a three-fold difference in the amount of acquisition practice.…”

Section: Discussionsupporting

confidence: 52%

“…The strengthening of an acquired response in amphibians has also been studied in terms of spontaneous decay (i.e., in the absence of training). In toads, an instrumental response decayed spontaneously as a function of the time elapsed since the last reinforced acquisition trial (Puddington, Papini, & Muzio, 2013). Toads maintained their response with a small relative loss of performance after the first 8 days without training.…”

Section: Overtraining Extinction Effectmentioning

confidence: 97%

“…After acquisition, each group spent 8 days without training before they received 8 additional extinction trials. Based on previous studies (Puddington et al, 2013), we expected that a small number of acquisition trials would impair retention of the instrumental response and increase extinction rate.…”

Section: Overtraining Extinction Effectmentioning

confidence: 99%

“…Animals were kept at 80 % of their standard weight during the entire experiment. This procedure successfully results in toads motivated to search for water (Muzio et al, 1992;Puddington et al, 2013).…”

Section: Subjectsmentioning

confidence: 99%

See 3 more Smart Citations

Retention and delayed extinction of an instrumental task in the toad Rhinella arenarum. Effect of the overtraining

Muzio

Puddington

Papini

2017

Av. Psicol. Latinoam.

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Amphibians and mammals share common basic mechanisms for associative learning. However, it has been observed that some reinforcement paradigms produce opposite results. For example, increasing the number of reinforced trials during acquisition (overtraining) improves extinction in mammals, but it impairs extinction in amphibians. This study evaluates the effects of overtraining on response retention and subsequent delayed extinction after an 8-day retention interval in toads. Two groups of animals were trained in a runway for either 5 or 15 acquisition trials, one trial per day. Acquisition was followed by an 8-day retention interval without training, and then by 8 extinction trials. No differences were observed in the rate of decay during the first trial of extinction or in the rate of delayed extinction. Since it had been previously observed that using the same parameters in the acquisition leads to a faster extinction in the 5-day group, the idea that mechanisms underlying extinction and spontaneous decay differ is considered.

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Section: Discussionsupporting

confidence: 52%

Section: Overtraining Extinction Effectmentioning

confidence: 97%

Section: Overtraining Extinction Effectmentioning

confidence: 99%

Section: Subjectsmentioning

confidence: 99%

See 2 more Smart Citations

Retention and delayed extinction of an instrumental task in the toad Rhinella arenarum. Effect of the overtraining

Muzio

Puddington

Papini

2017

Av. Psicol. Latinoam.

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“…Thus, toads trained under 50% partial reinforcement receiving a reward every 2 days on average extinguished faster than toads training under 100% continuous reinforcement receiving a reward every day, but at the same rate as a 100% continuous reinforcement group receiving a reward every 2 days on average. Follow-up experiments introducing a retention interval between the end of acquisition and the beginning of extinction showed a substantial decrement in behavior at longer intervals after similar acquisition performance (Puddington et al 2013). The conclusion favored after these experiments was that toads are sensitive to the decay of long-term memories encoding reward information, with little weight being assigned to nonrewarded trials.…”

Section: Discussionmentioning

confidence: 94%

Duration of extinction trials as a determinant of instrumental extinction in terrestrial toads (Rhinella arenarum)

2017

Self Cite

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Instrumental learning guides behavior toward resources. When such resources are no longer available, approach to previously reinforced locations is reduced, a process called extinction. The present experiments are concerned with factors affecting the extinction of acquired behaviors in toads. In previous experiments, total reward magnitude in acquisition and duration of extinction trials were confounded. The present experiments were designed to test the effects of these factors in factorial designs. Experiment 1 varied reward magnitude (900, 300, or 100 s of water access per trial) and amount of acquisition training (5 or 15 daily trials). With total amount of water access equated in acquisition, extinction with large rewards was faster (longer latencies in 900/5 than 300/15), but with total amount of training equated, extinction with small rewards was faster (longer latencies in 100/15 than 300/15). Experiment 2 varied reward magnitude (1200 or 120 s of water access per trial) while holding constant the number of acquisition trials (5 daily trials) and the duration of extinction trials (300 s). Extinction performance was lower with small, rather than large reward magnitude (longer latencies in 120/300 than in 1200/300). Thus, instrumental extinction depends upon the amount of time toads are exposed to the empty goal compartment during extinction trials.

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On the transfer of spatial learning between geometrically different shaped environments in the terrestrial toad, Rhinella arenarum

et al. 2019

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Vulnerability of long-term memory to temporal delays in amphibians

Cited by 11 publications

References 16 publications

Retention and delayed extinction of an instrumental task in the toad Rhinella arenarum. Effect of the overtraining

Retention and delayed extinction of an instrumental task in the toad Rhinella arenarum. Effect of the overtraining

Duration of extinction trials as a determinant of instrumental extinction in terrestrial toads (Rhinella arenarum)

On the transfer of spatial learning between geometrically different shaped environments in the terrestrial toad, Rhinella arenarum

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