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- W2010251102 abstract "It was shown that the late negative wave evoked in squirrel monkey cortex by tone cues signalling the availability of reward was smaller when the animal did not respond to the cue and often disappeared if the animal ignored many cues in succession. It decreased in amplitude as a test session progressed, and the rate of this decrease increased if the rate of reinforcement was increased. In some animals the size of the evoked wave was smaller if the animal was not fasted before a test session. In some animals the average size of the wave evoked by cues responded to had a significant positive correlation with the number of cues responded to and a negative correlation with the animal's average reaction time. It is concluded that the evoked wave is probably a reflection of the conditioned incentive value of the cue. Nous avons montre´que l'onde ne´gative tardivee´voque´e dans le cortex de sagouins (Saimiri sciureus) par des stimulus auditifs avertisseurs indiquant la disponibilite´d'un renforcement, est moins forte lorsque l'animal ne re´pond pasa`ce stimulus, et qu'elle disparaiˆt souvent lorsque l'animal ne fait pas attentiona`plusieurs sons qui se suivent. L'amplitude de l'onde diminuea`mesure que la se´ance expe´rimentale progresse, et le degre´de cette diminution augmente lorsque l'on augmente le de´bit de renforcements. Chez quelques animaux l'ondee´voque´e est plus faible dans le cas ou´l'animal n'a pase´te´prive´de nourriture avant la session. Chez quelques animaux l'on- de moyennee´voque´e par des stimuli suivis d'une re´ponse, pre´sente de fa¸on significative une corre´lation positive avec le nombre de stimuli auxquels ils ont re´pondu, et elle a une corre´lation ne´gative avec le temps de re´action moyen de l'animal. La conclusion est que l'ondee´voque´e refle`te probablement la valeur motivante conditionelle du stimulus." @default.
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- W2010251102 title "A cortical evoked potential that reflects the conditioned, positive incentive value of the stimulus. II. Drive motivation (Hunger)" @default.
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- W2010251102 doi "https://doi.org/10.1016/0013-4694(77)90171-7" @default.
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