Record Display for the EPA National Library Catalog


Main Title Serial Spatial Reversal Learning in Rats: Comparison of Instrumental and Automaintenance Procedures.
Author Bushnell, P. J. ; Stanton., M. E. ;
CORP Author Health Effects Research Lab., Research Triangle Park, NC. Developmental Toxicology Div.
Publisher c1991
Year Published 1991
Report Number EPA/600/J-92/022;
Stock Number PB92-143940
Additional Subjects Reversal learning ; Instrumental conditioning ; Rats ; Comparison ; Discrimination(Psychology) ; Graphs(Charts) ; Analysis of variance ; Statistical analysis ; Reprints ; Automaintenance
Library Call Number Additional Info Location Last
NTIS  PB92-143940 Some EPA libraries have a fiche copy filed under the call number shown. 07/26/2022
Collation 9p
Serial reversals of a spatial discrimination were trained in rats under automaintenance conditions, in which food reward occurred regardless of responding. The automaintained reversal learning was compared to instrumental reversal learning in other rats trained under a similar procedure which required responding for reward. In the automaintenance (AU) procedure, rats received food after every retraction of a 'positive' response lever (S(sup +); retraction of a second, neutral lever S(Sup 0) was not paired with food delivery. A second group of rats was trained on a similar instrumental schedule, in whi ch at least one response to the S(sup +) was required for food delivery. Response rates in the instrumental (IN) group were approximately double those of the AU group. However, ratios of S(sup +) to S(sup 0) response rates were similar to those of the AU group, and the serial reversal curves generated were qualitatively similar. Thus rats can show improvement across serial reversals of a spatial discrimination based entirely on pairings of stimulus events (automaintenance), in a manner similar to that observed in instrumental procedures, in which reward is contingent upon correct responding.