Concurrent second-order schedules of reinforcement: Relative response requirement

Jao Claudio Todorov, Walter Carneiro Monteiro


Three pigeons were submitted to concurrent variable-interval (fixed.ratio), variable-interval (fixed-ratio) second-order schedules in which programmed reinforcement rate was the same for both alternatives, and ratio requirement was systematically varied. For data analysis, each completion of a ratio was considered as one response. The relationship between response ratios and ratios of response requirement was well described by a power function, with exponents similar to those reported by Beautrais and Davison (1977).


Second-order schedules, concurrent schedules, variable interval, fixed ratio, response requirement, pecking, pigeons

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Editor in Chief:

Dr. Carlos J. Flores-Aguirre

ISSN: 0185-4534

ISSN Electrónico: 2007-0802