Effects of a Limited Hold on Changeovers Maintained by Concurrent Interval Schedules of Reinforcement

1978 ◽  
Vol 28 (3) ◽  
pp. 445-453 ◽  
Author(s):  
William Newby ◽  
John Memmott ◽  
Stephen B. Kendall
1971 ◽  
Vol 33 (3_suppl) ◽  
pp. 1283-1288 ◽  
Author(s):  
William R. Sewell ◽  
Theodore J. Newsom ◽  
Toby S. Altfield ◽  
Byron O. Garner ◽  
James F. Mc Coy ◽  
...  

Rats received discrimination training, wherein the S+ was a light-on (100 ft-c) and the S— was a light-off (0 ft-c). The schedules of reinforcement during S+ were a fixed-interval 30-sec. schedule with a limited hold of 5-sec. for two rats and a variable interval 30-sec. schedule for 3 Ss. After discrimination performance had stabilized, a probe-testing technique was used to test for generalization to three logarithmically arranged test stimuli (1, 25, and 50 ft-c). Tests were conducted with 5- and 2-day intertest intervals. The results indicated no difference in gradient shape after testing with 5- or 2-day intertest intervals. It was concluded that repeated probe testing for generalization virtually eliminates cumulative extinction effects that may distort gradient shapes.


2010 ◽  
Author(s):  
Nicholas Commons-Miller ◽  
Michael Commons ◽  
Robin Gane-McCalla ◽  
Alex Pekker ◽  
Michael Woodford

1972 ◽  
Vol 34 (2) ◽  
pp. 567-572 ◽  
Author(s):  
Inga S. Baird ◽  
Glenn H. Hughes

An experiment designed to specify the process similarities of information feedback and reinforcement and to note the interaction of 2 major feedback variables on a simple positioning task. 80 students were randomly divided into 4 groups receiving either 25, 50, 75, or 100% schedules of feedback, analogous to fixed-ratio schedules of reinforcement. The 4 groups were further divided into 2 subgroups that differed in terms of specificity of feedback. Results indicated that when all Ss were provided the same number of feedbacks, the groups did not differ during acquisition. Groups with partial information feedback demonstrated greater resistance to extinction. The coarse-scale treatment facilitated learning but had no effect during extinction. There was no interaction between frequency and specificity of information.


2009 ◽  
Vol 35 (2) ◽  
pp. 152-152
Author(s):  
Peter R. Killeen ◽  
Diana Posadas-Sanchez ◽  
Espen Borgå Johansen ◽  
Eric A. Thrailkill

1970 ◽  
Vol 26 (1) ◽  
pp. 83-86 ◽  
Author(s):  
A. L. Cone ◽  
Donna M. Cone

Laboratory-raised Virginia opossum have been found to readily acquire a lever-press response for water reinforcement. Fixed ratio behavior is comparable to that observed in other species. Fixed interval behavior, however, tends to move fairly rapidly toward an economical response style in which very few responses are emitted per reinforcement. Neither introduction of limited hold procedures nor lengthening of the deprivation schedule had any effect upon the FI responding.


1973 ◽  
Vol 33 (2) ◽  
pp. 627-631 ◽  
Author(s):  
Gerald D. Lachter

Following 30 sessions of training on a 60-sec. random-interval schedule of reinforcement, 2 pigeons were exposed to a multiple schedule containing non-contingent and variable delay components that provided equal frequencies of reinforcement. The introduction of the multiple schedule resulted in decreased response rare in both components, with a higher rate maintained under the variable delay. Post-reinforcement pauses were systematically increased during the non-contingent schedule, but no systematic increases in pause duration were noted for the variable delay component.


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