A brief opportunity to run does not function as a reinforcer for mice selected for high daily wheel-running rates

Article Abstract:

Selectively bred mice based on high daily wheel-running rates that run more total revolutions at higher average speeds were tested against mice from nonselected lines. Results showed that selective breeding altered the motivational system that reduces the reinforcing value of shorter running duration.

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Determinants of reinforcer accumulation during an operant task

Article Abstract:

Reinforcer accumulation is a dimension of operant behavior that relates to the analysis of hoarding and self-control. Experiments using rats on an earn lever are conducted to understand the responses and pellet accumulation to the spatial distance between an earn lever and a food cup.

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Varying wheel-running reinforcer duration within a session: Effect on the revolution-postreinforcement pause relation

Article Abstract:

Research indicates a positive relationship between postreinforcement pause and revolutions run in rats. Results are based on studies of the effects of fatigue on animal behavior.

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