Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 11 of 11 for “"Progressive-ratio schedule"”.
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An Evaluation of the Validity of Vocal Preference Assessments Used with Adults with Developmental Disabilities
… activities were evaluated using a progressive-ratio schedule of reinforcement, within a multielement design. Results showed the preference assessments that included activity access were more likely to identify reinforcers that were effective under increasing response requirements, …
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Determining the Effects of Basic Feedback and Directive Feedback Environments on Task Productivity, Accuracy, Perceived Stress, Control and Demand under Forced Choice and Mixed Choice Progressive Ratio Schedules of Reinforcement
… choice and mixed-choice conditions under a progressive ratio schedule. Dependent variables included task productivity and accuracy, monetary earnings, and self-reported social validity on perceived control, stress, and demand. The data demonstrate higher levels of accuracy associated with …
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Translating reinforcer dimensions and behavioral economic demand to inform incentive delivery in organizational behavior management
… a hypothetical and experiential demand preparation into a computerized task for use with Amazon Mechanical Turk Workers to evaluate the effects of parametric manipulations of reinforcer dimensions on performance using a behavioral economic demand framework. The first experiment examined the …
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THE GROUP II METABOTROPIC GLUTAMATE AGONIST, LY379268, DECREASES METHAMPHETAMINE SELF-ADMINISTRATION IN RATS
<italic>Rationale</italic>: Methamphetamine (METH) abuse is a growing problem worldwide, for which there is no effective pharmacotherapy. Group II metabotropic glutamate receptor (mGluR) agonists are proposed to serve as an addiction treatment and have been shown to reduce the reinforcing …
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Study of the Role of the Bed Nucleus of the Stria Termialis D1- and D2-Like Dopamine Receptors in Cocaine Self-Administering Rats
… into the BST immediately prior to self-administration sessions, were examined in both sucrose (180-minute sessions) and cocaine (270-minute sessions) self-administering rats. Injections of SCH-23390 (3.2 & 6.4 microgram) to the cocaine group significantly reduced the final ratio of operant lever …
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Neuromedin U Acts via the Paraventricular Nucleus of the Hypothalamus and the Dorsal Raphe Nucleus to Regulate Motivation for High-Fat Food
… (e.g., high-fat food) can be assessed using a progressive-ratio schedule of reinforcement under which an increasing number of lever presses are required to obtain subsequent reinforcers. Here, we used a progressive-ratio operant responding paradigm in combination with assessments of food …
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Effects of blockade of muscarinic receptors in the ventral tegmental area : attenuation of cocaine reward, but enhancement of locomotor activity and dopamine overflow in the nucleus accumbens
… cocaine self-administered on either fixed ratio or progressive ratio schedules of reinforcement. Low doses of atropine sulphate, the lipophilic form of the drug, produced a compensatory increase in cocaine intake while the administration of higher doses of atropine sulphate extinguished …
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Age- and sex-specific effects of amphetamines on cognition and serotonin in the orbitofrontal cortex
… in intravenous methamphetamine self-administration (Experiment 2). In Experiment 1, male and female Sprague-Dawley rats were treated with amphetamine (3 mg/kg i.p.) during adolescence or young adulthood and tested in a Pavlovian outcome devaluation task at the same age in adulthood. …
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An Assessment of Deficits in Simple Discrimination Following Frontal Traumatic Brain Injury in Rats: The Relative Contribution of Motor Deficits, Motivation Deficits and Neuroprotective Drug Administration
… on a simple visual discrimination task and a progressive ratio schedule of reinforcement (PR). After assessing their baseline discrimination performance, motor ability and PR performance, they were advanced to surgery and given either a bilateral frontal controlled cortical impact TBI or sham …
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AN INVESTIGATION OF VARIABLES CONTRIBUTING TO DISORDERED GAMBLING AND SLOT MACHINE PLAY
… Experiment II utilized a series of multiple schedules randomized across participants to examine differences in the rate of play when participants gambled on their most- and least-preferred machines. In Experiment III, the reinforcing effectiveness of the machines was evaluated. Participants …
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Evaluation of stimuli along a hierarchy under additive and geometric progressive-ratio schedules
… participants' responses to a task under two progressive-ratio schedules (i.e., geometric and additive). Furthermore, the study served as an examination of the variations in response levels across an array of preferences (HP, MP, LP) under the two increasing schedule requirements. Three …