Summation of latent inhibition and overshadowing in a generalized bait shyness paradigm of rats

Nakajima, Sadahiko; Nagaishi, Takatoshi

doi:10.1016/j.beproc.2005.02.022

Cited by 16 publications

(6 citation statements)

References 32 publications

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“…However, their result stands in contrast with Loy and Hall's (2002) experiment that used a CTA preparation. In order to resolve this discrepancy, Nakajima and Nagaishi (2005) later attempted to replicate Loy and Hall's counteraction between overshadowing and latent inhibition, but failed to do so. Instead of a counteraction between latent inhibition and overshadowing, Nakajima and Nagaishi observed summation of the two effects.…”

Section: Limitations On Generalization To Other Preparationsmentioning

confidence: 99%

Determinants of cue interactions

Wheeler

Miller

2008

Behavioural Processes

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In a Pavlovian conditioning situation, there are many training variables that may affect responding to a conditioned stimulus (CS), such as contiguity, contingency, and the presence of other CSs. This review describes recent experiments that show that some manipulations that usually decrease responding to a CS may have the opposite effect when they are combined with other normally pernicious manipulations. A theoretical framework that explains these so-called counteraction effects is provided. The apparent boundary conditions on the effects and limitations of the theory are discussed.

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Section: Limitations On Generalization To Other Preparationsmentioning

confidence: 99%

Determinants of cue interactions

Wheeler

Miller

2008

Behavioural Processes

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“…This outcome has been reported in studies using rats 13,[15][16][17] and pigeons. 18 In the two experiments reported here (see Table 1), we sought to extend these previous findings by introducing several procedural changes to the conditioning preparation. In all the previous studies mentioned above, LiCl was presented in isolation during discrimination training.…”

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confidence: 91%

Pavlovian discrimination in rats using voluntary exposure to a lithium chloride procedure

et al. 2014

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In a conditioned taste aversion (CTA) procedure, the consumption of a flavor is followed by the administration of a toxin (e.g. lithium chloride, LiCl), resulting in the future avoidance of the flavor. CTA studies typically make use of forced-exposure paradigms where a volume of the toxin dependent upon the weight of the animal is injected. The use of forced paradigms can be problematic when extended training is required, such as in stimulus discrimination training involving similar flavors, since the animals can be exposed to a high amount of the toxin. In the present study we confirmed the viability of an alternative voluntary-exposure paradigm that more closely mimics natural conditions and is more considerate of the welfare of the animals as a useful tool for investigating discrimination training. In three experiments, rats received free access to either a flavor (sucrose in Experiments 1a and 1b, and saccharin in Experiment 2) or a compound of the flavor mixed with LiCl. The presence of LiCl in the compound induced post-consumption illness. Rats acquired an aversion to the flavor + LiCl compound, thus reducing both their consumption of, and exposure to, LiCl, and gradually increased their consumption of the flavor alone. The present paradigm is more similar to natural conditions than the forced-exposure paradigm as it allows the animals to experience a direct relationship between the amount of the flavor consumed and the magnitude of the illness induced by the toxin.

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“…Blaisdell, Bristol, Gunther, and Miller (1998) used rats in a conditioned suppression study and found no evidence for LI of A after 10 ABϩ trials. In contrast, several studies that used fewer conditioning trials have found evidence for LI of A following A-, ABϩ training (Carr, 1974;Nakajima, Ka, & Imada, 1999;Nakajima & Nagaishi, 2005;Schnur, 1975), suggesting that evidence for LI of A may change across the course of ABϩ conditioning. For example, Carr (1974) found LI after compound training in a conditioned suppression experiment with rats.…”

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confidence: 91%

The loss of latent inhibition across compound conditioning.

Holmes

Harris

2009

Journal of Experimental Psychology: Animal Behavior Processes

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Six experiments used a magazine approach paradigm with rats to investigate latent inhibition (LI). Experiment 1 found that compound conditioning did not increase evidence for LI, in contrast to predictions from acquisition-deficit models that are based on a common error term (e.g., J. M. Pearce & G. Hall, 1980; A. R. Wagner, 1981). Instead, it appeared that preexposed and non-preexposed stimuli conditioned to the same asymptote following compound conditioning, as is the case when these stimuli are conditioned separately. This was confirmed in three further experiments that used probe trials to measure conditioning to each conditioned stimulus across the course of compound training. In these experiments, LI was observed during initial but not extended compound training, consistent with predictions derived from M. E. Bouton (1997) and the SLG model (N. A. Schmajuk, Y. Lam, & J. A. Gray, 1996). However, 2 further experiments did not support these models. Instead, these findings are most consistent with models that use separate error terms to compute the associative strength of conditioned stimuli conditioned in compound (S. E. Brandon, E. H. Vogel, & A. R. Wagner, 2003; M. E. Le Pelley, 2004; N. J. Mackintosh, 1975).

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Summation of latent inhibition and overshadowing in a generalized bait shyness paradigm of rats

Cited by 16 publications

References 32 publications

Determinants of cue interactions

Determinants of cue interactions

Pavlovian discrimination in rats using voluntary exposure to a lithium chloride procedure

The loss of latent inhibition across compound conditioning.

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