Linked Life Data

8851915

Source:http://linkedlifedata.com/resource/pubmed/id/8851915

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
1-2
pubmed:dateCreated
1996-12-5
pubmed:abstractText
Rats implanted with lateral hypothalamic electrodes pressed a lever to obtain 0.5 s bursts of pulses under the four combinations of fixed or variable, interval or ratio, schedules of reinforcement. Along with continuous reinforcement schedules, intervals of 1, 2, 5, and 10 s, or ratios of 2, 5, and 10 responses per stimulation were used in sessions wherein the frequency thresholds, defined as pulse frequencies that would support half-maximum rates of response, were estimated. Thresholds rose systematically under both ratio and interval schedules of reinforcement, and there was no difference between fixed and variable variations. When normalized data were plotted as a function of reinforcement density, thresholds from both interval and ratio schedules followed the same pattern, suggesting that the common factor was time between rewards. An increase in the current with a corresponding decrease in pulse frequency increased the rate at which time between rewards augmented thresholds.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Jan
pubmed:issn
0166-4328
pubmed:author
pubmed:issnType
Print
pubmed:volume
74
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
57-64
pubmed:dateRevised
2006-3-1
pubmed:meshHeading
pubmed:year
1996
pubmed:articleTitle
Intermittent rewards raise self-stimulation thresholds.
pubmed:affiliation
School of Psychology, University of Ottawa, Ontario, Canada.
pubmed:publicationType
Journal Article