منابع مشابه
Comparison of fixed-ratio and progressive-ratio schedules of maintenance of stimulant drug-reinforced responding.
The effectiveness of doses of i.v. cocaine and nomifensine in maintaining lever-press responding in rhesus monkeys was evaluated under two schedules, fixed- and progressive-ratio (FR, PR). The doses that maintained maximum rates of responding under the fixed-ratio schedule were 0.32 mg/kg per injection cocaine and 0.10 mg/kg per injection nomifensine. The fixed-ratio rates maintained by this do...
متن کاملEffects of Exposure to Fe Particles or Protons on Fixed-ratio Operant Responding in Rats
Protons / Fe / Fixed-ratio / Conditioning On long-duration trips outside of the magnetosphere, astronauts will be exposed to protons and to heavy particles which can affect their performance of required tasks. It is essential to determine the range of behaviors that might be affected by exposure to these types of radiation in order to understand the nature of behavioral deficits and to develop ...
متن کاملEffects of exposure to 56Fe particles or protons on fixed-ratio operant responding in rats.
On long-duration trips outside of the magnetosphere, astronauts will be exposed to protons and to heavy particles which can affect their performance of required tasks. It is essential to determine the range of behaviors that might be affected by exposure to these types of radiation in order to understand the nature of behavioral deficits and to develop effective countermeasures. The present exp...
متن کاملOverdiagnosing subjects with COPD using the 0.7 fixed ratio: correlation with a poor health-related quality of life.
BACKGROUND The current debate about the lower limit of normal (LLN) vs the 0.7 fixed ratio to diagnose COPD is not completely resolved, and little information about the clinical impact of these different criteria is available. We compared differences in health-related quality of life, exacerbations, exercise tolerance, physical activity, comorbidity, and systemic biomarkers of subjects with FEV...
متن کاملGOLD and the fixed ratio
Correspondence: Jørgen Vestbo Respiratory Research Group, ERC Building, 2nd Floor, University Hospital, South Manchester, NHS Foundation Trust, Southmoor Road, Manchester M23 9LT, UK Email [email protected] Dear editor I read with interest the paper entitled “Diagnosis of airway obstruction in the elderly: contribution of the SARA study” by Sorino et al in a recent issue of this jo...
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ژورنال
عنوان ژورنال: Bulletin of the Psychonomic Society
سال: 1973
ISSN: 0090-5054
DOI: 10.3758/bf03334372