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extinction
(redirected from Pre-historic creature)

   Also found in: Dictionary/thesaurus, Legal, Encyclopedia, Wikipedia 0.01 sec.
extinction /ex·tinc·tion/ (eks-tink´shun) in psychology, the disappearance of a conditioned response as a result of nonreinforcement; also, the process by which the disappearance is accomplished.
ex·tinc·tion (k-stngkshn)
n.
Progressive reduction in the strength of the conditioned response in successive conditioning trials during which only the conditioned stimulus is presented and the unconditioned stimulus is omitted. See absorbance.

extinction
[iksting′shən]
a state of being lost or destroyed.

extinction [eks-ting´shun]
in psychology, the disappearance of a conditioned response as a result of its not being reinforced; also, the process by which the disappearance is accomplished. See also conditioning.

extinction
the disappearance of a conditioned response as a result of nonreinforcement.

extinction
Psychiatry A facet of operant–classical conditioning, in which the conditioned response is weakened and eventually disappears by nonreinforcement. See Operant conditioning, Respondent conditioning, Sensory extinction.


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Sid the Sloth plays mum to three newborn dinosaurs, but then their real mother comes looking and chases them into a subterranean world full of pre-historic creatures beneath the ice.
But, before keen paleontologists head out to catch a glimpse of the pre-historic creatures they should know the sightings were, in fact, of realistic, life-sized replicas.
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