Operant Performance
Mostrando 13-18 de 18 artigos, teses e dissertações.
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13. Concurrent Second-Order Schedules: Some Effects Of Variations In Response Number And Duration
To examine the effects on concurrent performance of independent manipulations of response-unit duration and number, 6 hens were exposed to concurrent second-order schedules of reinforcement. Each first-order operant unit required completion of a fixed-ratio schedule within the time specified by a fixed-interval schedule, with one further response completing
Society for the Experimental Analysis of Behavior.
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14. A Theory Of Attending And Reinforcement In Conditional Discriminations
A model of conditional discrimination performance (Davison & Nevin, 1999) is combined with the notion that unmeasured attending to the sample and comparison stimuli, in the steady state and during disruption, depends on reinforcement in the same way as predicted for overt free-operant responding by behavioral momentum theory (Nevin & Grace, 2000). The rate o
Society for the Experimental Analysis of Behavior.
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15. A synthetic agonist at the orphanin FQ/nociceptin receptor ORL1: Anxiolytic profile in the rat
The biochemical and behavioral effects of a nonpeptidic, selective, and brain-penetrant agonist at the ORL1 receptor are reported herein. This low molecular weight compound {(1S,3aS)-8- (2,3,3a,4,5,6-hexahydro-1H-phenalen-1-yl)-1-phenyl-1,3,8-triaza- spiro[4.5]decan-4-one} has high affinity for recombinant human ORL1 receptors and has 100-fold selectivity fo
The National Academy of Sciences.
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16. Pavlovian Pattern Learning by Nonlinear Neural Networks
This note describes laws for the anatomy, potentials, spiking rules, and transmitters of some networks of formal neurons that enable them to learn spatial patterns by Pavlovian conditioning. Applications to spacetime pattern learning and operant conditioning are then possible, if the conditioning is viewed as multi-channel Pavlovian conditioning in a highly
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17. Orbital Prefrontal Cortex and Guidance of Instrumental Behavior of Rats by Visuospatial Stimuli Predicting Reward Magnitude
The orbital prefrontal cortex (OPFC) is part of a circuitry mediating the perception of reward and the initiation of adaptive behavioral responses. We investigated whether the OPFC is involved in guidance of the speed of instrumental behavior by visuospatial stimuli predictive of different reward magnitudes. Unoperated rats, sham-lesioned rats, and rats
Cold Spring Harbor Laboratory Press.
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18. DNA targeting of rhinal cortex D2 receptor protein reversibly blocks learning of cues that predict reward
When schedules of several operant trials must be successfully completed to obtain a reward, monkeys quickly learn to adjust their behavioral performance by using visual cues that signal how many trials have been completed and how many remain in the current schedule. Bilateral rhinal (perirhinal and entorhinal) cortex ablations irreversibly prevent this learn
National Academy of Sciences.