SUBOPTIMAL CHOICE IN A PERCENTAGE‐REINFORCEMENT PROCEDURE: EFFECTS OF SIGNAL CONDITION AND TERMINAL‐LINK LENGTH

SUBOPTIMAL CHOICE IN A PERCENTAGE‐REINFORCEMENT PROCEDURE: EFFECTS OF SIGNAL CONDITION AND... Pigeons' choice between reliable (100%) and unreliable (50%) reinforcement was studied using a concurrent‐chains procedure. Initial links were fixed‐ratio 1 schedules, and terminal links were equal fixed‐time schedules. The duration of the terminal links was varied across conditions. The terminal link on the reliable side always ended in food; the terminal link on the unreliable side ended with food 50% of the time and otherwise with blackout. Different stimuli present during the 50% terminal links signaled food or blackout outcomes under signaled conditions but were uncorrelated with outcomes under unsignaled conditions. In signaled conditions, most pigeons displayed a nearly exclusive preference for the 100% alternative when terminal links were short (5 or 10 s), but with terminal links of 30 s or longer, preference for the 100% alternative was sharply reduced (often to below .5). In unsignaled conditions, most pigeons showed extreme preference for the 100% alternative with either short (5 s) or longer (30 s) terminal links. Thus, pigeons' choice between reliable and unreliable reinforcement is influenced by both the signal conditions on the unreliable alternative and the duration of the terminal‐link delay. With a long delay and signaled outcomes, many pigeons display a suboptimal tendency to choose the unreliable side. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Journal of the Experimental Analysis of Behavior Wiley

SUBOPTIMAL CHOICE IN A PERCENTAGE‐REINFORCEMENT PROCEDURE: EFFECTS OF SIGNAL CONDITION AND TERMINAL‐LINK LENGTH

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Publisher
Wiley
Copyright
1990 Society for the Experimental Analysis of Behavior
ISSN
0022-5002
eISSN
1938-3711
DOI
10.1901/jeab.1990.53-219
pmid
2324664
Publisher site
See Article on Publisher Site

Abstract

Pigeons' choice between reliable (100%) and unreliable (50%) reinforcement was studied using a concurrent‐chains procedure. Initial links were fixed‐ratio 1 schedules, and terminal links were equal fixed‐time schedules. The duration of the terminal links was varied across conditions. The terminal link on the reliable side always ended in food; the terminal link on the unreliable side ended with food 50% of the time and otherwise with blackout. Different stimuli present during the 50% terminal links signaled food or blackout outcomes under signaled conditions but were uncorrelated with outcomes under unsignaled conditions. In signaled conditions, most pigeons displayed a nearly exclusive preference for the 100% alternative when terminal links were short (5 or 10 s), but with terminal links of 30 s or longer, preference for the 100% alternative was sharply reduced (often to below .5). In unsignaled conditions, most pigeons showed extreme preference for the 100% alternative with either short (5 s) or longer (30 s) terminal links. Thus, pigeons' choice between reliable and unreliable reinforcement is influenced by both the signal conditions on the unreliable alternative and the duration of the terminal‐link delay. With a long delay and signaled outcomes, many pigeons display a suboptimal tendency to choose the unreliable side.

Journal

Journal of the Experimental Analysis of BehaviorWiley

Published: Mar 1, 1990

References

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