Document Detail

Scaling relative incentive value: different adjustments to incentive downshift in pigeons and rats.
MedLine Citation:
PMID:  18755254     Owner:  NLM     Status:  MEDLINE    
Previous research suggests that pigeons and rats show differences in their behavioral adjustments in spaced-trial, incentive-downshift situations. Also, Papini and Pellegrini [Papini, M.R., Pellegrini, S., 2006. Scaling relative incentive value in consummatory behavior. Learn. Motiv. 37, 357-378] and Pellegrini and Papini [Pellegrini, S., Papini, M.R., 2007. Scaling relative incentive value in anticipatory behavior. Learn. Motiv. 38, 128-154] showed that changes in the rat's lever-pressing performance, runway running, and consumption of sucrose solutions after downshifts in incentive magnitude were a function of the ratio of postshift/preshift incentive magnitudes. Here, two experiments using a Pavlovian autoshaping procedure studied the adjustment of pigeons and rats to changes in incentive magnitude. In Experiment 1, pigeons received light-food pairings, whereas in Experiment 2, rats received lever-sucrose pairings. As a result, key-pecking and lever-pressing developed in each experiment, respectively. Preshift incentive magnitudes were downshifted so as to obtain postshift/preshift ratios of 0.125 and 0.25. Pigeons responded during the postshift phase according to the preshift incentive value and independently of the ratio value. However, rats showed ratio constancy, responding during the postshift in accordance with the postshift/preshift ratio, rather than with the absolute magnitudes of either the preshift or postshift incentives. These results support the comparative hypothesis that the mechanisms underlying ratio constancy during incentive downshifts are unique to mammals.
Santiago Pellegrini; María Florencia López Seal; Mauricio R Papini
Related Documents :
15464744 - Disinhibition of maternal behavior following neurotoxic lesions of the hypothalamus in ...
9184114 - Intracerebroventricular glial cell line-derived neurotrophic factor improves motor func...
15322304 - Infusion of human umbilical cord blood cells in a rat model of stroke dose-dependently ...
6145494 - A kinetic scattering approach to the non-linear instabilities of rat brain tyrosine hyd...
10958834 - Long-term consumption of a methionine-supplemented diet increases iron and lipid peroxi...
23738784 - Altered diurnal variation and localization of clock proteins in the remnant kidney of 5...
Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't     Date:  2008-08-06
Journal Detail:
Title:  Behavioural processes     Volume:  79     ISSN:  1872-8308     ISO Abbreviation:  Behav. Processes     Publication Date:  2008 Nov 
Date Detail:
Created Date:  2008-10-20     Completed Date:  2008-12-22     Revised Date:  2014-03-25    
Medline Journal Info:
Nlm Unique ID:  7703854     Medline TA:  Behav Processes     Country:  Netherlands    
Other Details:
Languages:  eng     Pagination:  182-8     Citation Subset:  IM    
Export Citation:
APA/MLA Format     Download EndNote     Download BibTex
MeSH Terms
Adaptation, Psychological / physiology*
Analysis of Variance
Behavior, Animal / physiology*
Conditioning, Classical / physiology*
Conditioning, Operant / physiology*
Extinction, Psychological / physiology*
Food Deprivation / physiology
Rats, Wistar
Reinforcement Schedule
Species Specificity

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

Previous Document:  Story-like organization of REM-dreams in patients with narcolepsy-cataplexy.
Next Document:  Determining the relationship of gene expression and global mRNA stability in Drosophila melanogaster...