scholarly journals Reversal of an operant discrimination by noncontingent discrimination reversal training

1966 ◽  
Vol 4 (7) ◽  
pp. 247-248 ◽  
Author(s):  
Milton A. Trapold
Keyword(s):  
Discrimination Reversal ◽  
Reversal Training ◽  
Operant Discrimination

Error Reduction by Pigeons on a Spatial Successive Reversal Task under Conditions of Non-Correction

1966 ◽  
Vol 18 (2) ◽  
pp. 367-370 ◽  
Author(s):  
Robert L. Gossette ◽  
Harvey Cohen
Keyword(s):  
Error Score ◽  
Error Reduction ◽  
Discrimination Reversal ◽  
Spatial Discrimination ◽  
Reversal Training ◽  
Reversal Task ◽  
Reversal Performance ◽  
Successive Reversal ◽  
Initial Peak

The performance of 5 pigeons on a successive spatial discrimination reversal task was studied over 29 reversals under conditions of non-correction. A significant reduction of errors occurred following an initial peak error score on the second reversal. Intra-problem error reduction was also significant, with errors remaining only during the initial trials of a session with continued reversal training. Terminal reversal performance approached one-trial reversal.

Pseudolearners in Discrimination Reversal

1979 ◽  
Vol 48 (3_suppl) ◽  
pp. 1183-1193
Author(s):  
Don F. Gonella ◽  
Philip Friedman
Keyword(s):  
Factorial Design ◽  
Discrimination Learning ◽  
Discrimination Reversal ◽  
Wisconsin General Test Apparatus ◽  
Reversal Training ◽  
Test Apparatus ◽  
Training Performance ◽  
General Test

This research investigated the shape of the acquisition and reversal functions in retardates' discrimination learning, with safeguards against suspected artifacts in other studies. A modified Wisconsin General Test Apparatus was used with 60 retardates in a 2 × 2 factorial design. Another 11 were classified as pseudolearners. The variables were the prereversal criteria and the number of irrelevant dimensions. After meeting criterion subjects were given 30 more trials for the detection of pseudolearners, but all received reversal training. Performance was stationary in both acquisition and reversal, suggesting all-or-none learning. For learners, differences of midreversal plateaus appeared which were opposite to predictions of the Zeaman and House (1963) theory. When pseudolearners were included, however, the plateau effect partially conformed to the theory.

Effects of Overlearning and Spatial Delay of Reinforcement upon a Discrimination Reversal

1965 ◽  
Vol 16 (1) ◽  
pp. 79-83 ◽  
Author(s):  
Coleman Paul ◽  
Joan Havlena
Keyword(s):  
Discrimination Task ◽  
Original Learning ◽  
Brightness Discrimination ◽  
Positive Stimulus ◽  
Discrimination Reversal ◽  
Reversal Training ◽  
Delay Of Reinforcement ◽  
Brightness Discrimination Task

Rats were trained on a brightness discrimination task under two conditions of spatial delay of reinforcement. Groups received either 0 or 150 postcriterial trials and then were given reversal training. Reversal training was under either the same delay as experienced in original learning or the alternate one. The results indicated that the delay variable, ineffective in original learning, affected reversal acquisition. The postcriterial trials had no affect on trials to reversal criterion. Further analysis indicated that overtraining resulted in a greater number of initial responses to the originally positive stimulus early in reversal training.

Transfer of a Discrimination and a Discrimination Reversal between Two Manipulandum-Defined Responses

1965 ◽  
Vol 16 (3_suppl) ◽  
pp. 1213-1221 ◽  
Author(s):  
Milton A. Trapold ◽  
Penelope B. Odom
Keyword(s):  
Discrimination Training ◽  
Variable Interval ◽  
Discrimination Reversal ◽  
Reversal Training ◽  
Free Operant ◽  
Mediational Process ◽  
Response Transfer ◽  
Overt Responding ◽  
Classically Conditioned ◽  
Free Operant Situation

An experiment was performed to determine the extent to which the effects of continuous reinforcement, variable interval reinforcement, discrimination training, and discrimination reversal training would transfer between a vertical and a horizontal bar-pressing response in the free operant situation. No transfer of continuous or variable interval reinforcement was found. However, both discrimination training and discrimination reversal training showed very appreciable amounts of inter-response transfer. These results are discussed in terms of a mediational process involving classically conditioned mediators which exert discriminative control over overt responding.

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