caa a22 4500 465736777 CHVBK 20180323111756.0 cr unu---uuuuu 170327e19900901xx s 000 0 eng 10.1007/BF02245743 doi (NATIONALLICENCE)springer-10.1007/BF02245743 Effects of alcohol on reinforced repetitions and reinforced variations in rats [Elektronische Daten] [Elizabeth McElroy, Allen Neuringer] Six rats were rewarded with food pellets for repeating a particular sequence of four responses on two levers, namely left-left-right-right. Ethanol (0.75 g/kg and 2.0 g/kg injected IP) increased the variability of sequences under these "repeat” contingencies, resulting in fewer rewarded trials. Six other rats were rewarded only if their sequence of left and right responses in the current trial differed from each of the previous five trials. Ethanol had little effect on sequence variability and no effect on reward probability under these "vary” contingencies. The relative difficulties of the repeat and vary tasks were manipulated to show that task difficulty did not account for the results. Thus alcohol increased or maintained behavioral variability, thereby impairing reinforced repetitions but not reinforced variations. When previously reported results from rats in radial arm mazes were compared with a simulated random model, alcohol was found to increase behavioral variability under that procedure as well. Springer-Verlag, 1990 Behavioral variability nationallicence Response sequences nationallicence Operant variability nationallicence Radial arm maze nationallicence Ethanol nationallicence Rats nationallicence McElroy Elizabeth Department of Psychology, Reed College, 3203 Southeast Woodstock Boulevard, 97202, Portland, OR, USA aut Neuringer Allen Department of Psychology, Reed College, 3203 Southeast Woodstock Boulevard, 97202, Portland, OR, USA aut Psychopharmacology Springer-Verlag 102/1(1990-09-01), 49-55 0033-3158 102:1<49 1990 102 213 https://doi.org/10.1007/BF02245743 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02245743 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- McElroy Elizabeth Department of Psychology, Reed College, 3203 Southeast Woodstock Boulevard, 97202, Portland, OR, USA aut NATIONALLICENCE 700 1- Neuringer Allen Department of Psychology, Reed College, 3203 Southeast Woodstock Boulevard, 97202, Portland, OR, USA aut NATIONALLICENCE 773 0- Psychopharmacology Springer-Verlag 102/1(1990-09-01), 49-55 0033-3158 102:1<49 1990 102 213 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer