Reinforcement Schedule (Latest Articles)

Latest indexed articles for 'Reinforcement Schedule'

Articles 121 to 130 of 200:

Exposure to elevated levels of dietary fat attenuates psychostimulant reward and mesolimbic dopamine turnover in the rat.

29 Nov 2008 Recent studies indicate that decreased central dopamine is associated with diet-induced obesity in humans and in animal models. In the current study, the authors assessed the hypothesis that diet-induced obesity reduces mesolimbic dopamine function. ...
rec_pub_19045945-exposure-elevated-levels-dietary-fat-attenuates-psychostimulant.htm

Reinforcing effects of stimulants in humans: sensitivity of progressive-ratio schedules.

29 Nov 2008 Drug self-administration methodologies have been developed for use in humans to model naturalistic stimulant drug-taking behaviors. These methodologies use a number of schedules of reinforcement, including progressive-ratio schedules. As the name ...
rec_pub_19086771-reinforcing-effects-stimulants-humans-sensitivity-progressive-ratio.htm

Modeling operant behavior in the Parkinsonian rat.

25 Nov 2008 Mathematical principles of reinforcement (MPR; Killeen, 1994) is a quantitative model of operant behavior that contains three parameters representing motor capacity (delta), motivation (a), and short term memory (lambda). The present study applied ...
rec_pub_19073222-modeling-operant-behavior-parkinsonian-rat.htm

Delay of gratification by chimpanzees (Pan troglodytes) in working and waiting situations.

23 Nov 2008 We tested four chimpanzees in a self-control task in which food rewards accumulated as long as they were not eaten. In one condition, the chimpanzees had to perform a computer task that directly led to the delivery of the food rewards. In another ...
rec_pub_19084581-delay-gratification-chimpanzees-pan-troglodytes-working-waiting.htm

Relative potency of the opioid antagonists naloxone and 6-alpha-naloxol to precipitate withdrawal from acute morphine dependence varies with time post-antagonist.

22 Nov 2008 The current study compared the potency of naloxone versus 6-alpha-naloxol to precipitate opioid withdrawal under varying conditions of morphine pretreatment history using suppression of operant responding for food reward as the index of withdrawal. ...
rec_pub_19061911-relative-potency-opioid-antagonists-naloxone-6-alpha-naloxol.htm

Body weight manipulation, reinforcement value and choice between sucrose and wheel running: a behavioral economic analysis.

19 Nov 2008 Twelve female Long-Evans rats were exposed to concurrent variable (VR) ratio schedules of sucrose and wheel-running reinforcement (Sucrose VR 10 Wheel VR 10; Sucrose VR 5 Wheel VR 20; Sucrose VR 20 Wheel VR 5) with predetermined budgets (number of ...
rec_pub_19063951-body-weight-manipulation-reinforcement-value-choice-sucrose-wheel.htm

Effects of reinforcer magnitude and alternative reinforcer delay on preference for alcohol during a multiple-choice procedure.

11 Nov 2008 The Multiple-Choice Procedure [MCP; Griffiths, R.R., Troisi II, J.R., Silverman, K., Mumford, G.K., 1993. Multiple-choice procedure: an efficient approach for investigating drug reinforcement in humans. Behav. Pharmacol. 4, 3-13; Griffiths, R.R., ...
rec_pub_19013028-effects-reinforcer-magnitude-alternative-reinforcer-delay-preference.htm

Dopamine in the prefrontal cortex regulates rats behavioral flexibility to changing reward value.

9 Nov 2008 Prefrontocortical dopamine (DA) plays an essential role in the representation of reward value and is implicated in behavioral flexibility. We here tested the effect of systemic and local blockade of DA D1- and D2-receptors in the medial prefrontal ...
rec_pub_19041903-dopamine-prefrontal-cortex-regulates-rats-behavioral-flexibility.htm

Theory meets pigeons: the influence of reward-magnitude on discrimination-learning.

6 Nov 2008 Modern theoretical accounts on reward-based learning are commonly based on reinforcement learning algorithms. Most noted in this context is the temporal-difference (TD) algorithm in which the difference between predicted and obtained reward, the ...
rec_pub_19041347-theory-meets-pigeons-influence-reward-magnitude-discrimination.htm

An application of the active time model to multiple concurrent variable-interval schedules.

4 Nov 2008 The current experiment investigates whether an active time model can account for anomalous results that have emerged from multiple schedule, concurrent variable-interval (VI) VI experiments. The model assumes that (1) during concurrent VI VI ...
rec_pub_19038316-an-application-active-time-model-multiple-concurrent-variable.htm

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