{"status":"ok","message-type":"work","message-version":"1.0.0","message":{"indexed":{"date-parts":[[2024,7,16]],"date-time":"2024-07-16T00:56:13Z","timestamp":1721091373009},"reference-count":15,"publisher":"Wiley","issue":"2","license":[{"start":{"date-parts":[[2013,2,26]],"date-time":"2013-02-26T00:00:00Z","timestamp":1361836800000},"content-version":"vor","delay-in-days":12416,"URL":"http:\/\/onlinelibrary.wiley.com\/termsAndConditions#vor"}],"content-domain":{"domain":["onlinelibrary.wiley.com"],"crossmark-restriction":true},"short-container-title":["J Exper Analysis Behavior"],"published-print":{"date-parts":[[1979,3]]},"abstract":"<jats:p>Rats were trained on concurrent fixed\u2010ratio variable\u2010ratio or concurrent fixed\u2010ratio mixed\u2010ratio schedules of food reinforcement. The variable\u2010ratio schedule was composed of an arithmetic sequence of 11 ratios that averaged 50; the mixed\u2010ratio schedule consisted of equiprobable ratios of 1 and 99. Fixed\u2010ratio values, varied over experimental conditions, included 25, 35, 50, 60, and 99. The proportion of responses and time allocated to the variable\u2010 or mixed\u2010ratio schedule increased as the size of the fixed ratio increased. For most subjects, higher proportions of responses and time were maintained on the fixed\u2010ratio schedule at fixed\u2010ratio values of 25 and 35; higher proportions of responses and time were maintained on the variable\u2010 or mixed\u2010ratio schedule at fixed\u2010ratio values of 50 or higher. On concurrent variable\u2010ratio fixed\u2010ratio schedules, the tendency for responding to be maintained exclusively by one schedule was related to the difference in local reinforcement rates obtained from those schedules. Exclusive responding was approximated when the difference in local reinforcement rates obtained from those schedules was large; responding was more evenly distributed between the schedules as the difference in the rates at which reinforcement was obtained from each decreased.<\/jats:p>","DOI":"10.1901\/jeab.1979.31-225","type":"journal-article","created":{"date-parts":[[2006,3,2]],"date-time":"2006-03-02T16:42:55Z","timestamp":1141317775000},"page":"225-237","update-policy":"http:\/\/dx.doi.org\/10.1002\/crossmark_policy","source":"Crossref","is-referenced-by-count":14,"title":["CONCURRENT RATIO SCHEDULES: FIXED vs. VARIABLE RESPONSE REQUIREMENTS<sup>1<\/sup>"],"prefix":"10.1002","volume":"31","author":[{"given":"David P.","family":"Rider","sequence":"first","affiliation":[],"role":[{"role":"author","vocabulary":"crossref"}]}],"member":"311","published-online":{"date-parts":[[2013,2,26]]},"reference":[{"key":"e_1_2_1_1_2_2","volume-title":"The strength of conditioned reinforcers as a function of frequency and probability of reinforcement","author":"Autor S. 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