: the process of eliminating or reducing a conditioned (see conditionedsense 2) response by not reinforcing it
When a rat in a Skinner box presses a lever, a tone sounds momentarily, followed shortly by delivery of food. … After the animal has been conditioned in this way, the experimenter begins extinction, so that when the rat presses the lever neither the tone nor the food appears.—Rita L. Atkinson et al.
the extinction of all life in the region
the extinction of many old traditions
Mass extinctions of prehistoric animals are known to have occurred.
Recent Examples on the WebFor the first time, scientists have photographed a large, elusive rat that’s on the brink of extinction.—Sarah Kuta, Smithsonian Magazine, 29 Nov. 2023 In fact, humans may have been responsible for the sluggish animal’s ultimate extinction.—Donna Sarkar, Discover Magazine, 17 Nov. 2023 The executive order also contains some provisions that will please the A.I. ethics crowd — a group of activists and researchers who worry about near-term harms from A.I., such as bias and discrimination, and who think that long-term fears of A.I. extinction are overblown.—Kevin Roose, New York Times, 31 Oct. 2023 All of the above? Modeling these impacts, combined with data on the pattern of extinctions, has led to various opinions on what proved decisive regarding the extermination of so many species.—John Timmer, Ars Technica, 31 Oct. 2023 And now these miniature Key deer are protected, having been saved from the brink of extinction.—Tracey Minkin, Travel + Leisure, 27 Oct. 2023 Dismissing the extinction of species as no big deal merely demonstrates human narrow-mindedness and ignorance about our impact on the world.—Michael Hiltzik, Los Angeles Times, 24 Oct. 2023 This puts the species at risk of extinction, because without males, the endangered reptiles can’t reproduce.—Sarah Kuta, Smithsonian Magazine, 16 Nov. 2023 Populations were wiped to the brink of extinction prior to the 20th century as they were hunted for their coats, which is the second-thickest in the animal kingdom.—Julia Jacobo, ABC News, 9 Nov. 2023 See More
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