PubMed · 14130099
APERIODICITY AS A FACTOR IN CHOICE.
Abstract
Four pigeons were trained to peck at either of two response-keys. Pecks at either key occasionally produced a secondary reinforcer, in the presence of which further pecks occasionally produced food, the primary reinforcer. All pigeons showed a consistent preference for variable (as compared to fixed) interval schedules of primary reinforcement.
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R J HERRNSTEIN. 1964. APERIODICITY AS A FACTOR IN CHOICE.. https://doi.org/10.1901/jeab.1964.7-179
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