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Related Experiment Videos

Schedule-induced drinking: Elicitation, anticipation, or behavioral interaction?

A K Reid, J E Staddon

    Journal of the Experimental Analysis of Behavior
    |July 1, 1982
    PubMed
    Summary

    Schedule-induced drinking in rats is not directly caused by food or associated cues. Instead, rats prioritize food-seeking behaviors over drinking when food availability increases, suggesting complex behavioral interactions.

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    Area of Science:

    • Behavioral Neuroscience
    • Animal Behavior
    • Operant Conditioning

    Background:

    • Schedule-induced polydipsia is a phenomenon where animals increase drinking behavior under specific food reinforcement schedules.
    • Previous research has explored the relationship between food delivery schedules and drinking patterns, with varying explanations.
    • Understanding the precise triggers and mechanisms of schedule-induced drinking is crucial for behavioral science.

    Purpose of the Study:

    • To investigate the relationship between individual food-pellet presentations and drinking behavior in rats.
    • To determine if food presentations or associated stimuli elicit schedule-induced drinking.
    • To explore the role of dynamic behavioral interactions in schedule-induced drinking.

    Main Methods:

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  • Five experiments were conducted using rats maintained on fixed-time (FT) food schedules.
  • Experiments involved presenting unsignaled and signaled extra food, observing drinking patterns before and after presentations.
  • Drinking persistence was assessed after consecutive intervals ending with extra food; food delivery magnitude was varied across sessions.

    • Main Results:

    • Schedule-induced drinking was not elicited by food presentations or stimuli associated with a high food rate.
    • Rats prioritized food-related behaviors over drinking when presented with stimuli signaling an increased local probability of food delivery.
    • Drinking patterns were modified by the persistence of extra food delivery across intervals.

    Conclusions:

    • Schedule-induced drinking is not a direct effect of food reinforcement contingencies but arises from dynamic interactions between behaviors.
    • Rats exhibit a rule-based behavior, prioritizing food acquisition over drinking when food availability increases.
    • The findings challenge simple elicitation or induction models, highlighting the complexity of motivated behavior under reinforcement schedules.