Linked Life Data

6491608

Source:http://linkedlifedata.com/resource/pubmed/id/6491608

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
4
pubmed:dateCreated
1984-12-20
pubmed:abstractText
Two experiments demonstrated unblocking in an appetitive conditioning preparation with rat subjects. One stimulus, A, was first paired with either a low-value reinforcer (one food pellet) or a high-value reinforcer (one food pellet followed by two more food pellets). A second stimulus, X, was then added to A, and the compound was reinforced with either the high- or low-value reinforcer. Conditioning to X was blocked if the same reinforcer was used in both phases of the experiment, but there was substantial conditioning to X when the reinforcer value was shifted either up or down when X was introduced. Experiment 1 demonstrated this unblocking phenomenon using a design that minimized the potential contribution of generalization decrement. Experiment 2 examined the effects of a variety of posttraining manipulations on conditioned responding to the added X cue after unblocking procedures. Responding of subjects that received downshifts in reinforcer value when X was introduced was affected by several posttraining manipulations, including changes in context value. Those manipulations had smaller effects on the responding of subjects that received upshifts in reinforcer value and no effects on responding in control conditions.
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:status
MEDLINE
pubmed:month
Oct
pubmed:issn
0097-7403
pubmed:author
pubmed:issnType
Print
pubmed:volume
10
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
476-97
pubmed:dateRevised
2006-11-15
pubmed:meshHeading
pubmed:year
1984
pubmed:articleTitle
Unblocking in Pavlovian appetitive conditioning.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, P.H.S.