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Concurrent-schedule performance in dairy cows: persistent undermatching

T M Foster1, W Temple, B Robertson

  • 1Department of Psychology, University of Waikato, Hamilton, New Zealand.

Journal of the Experimental Analysis of Behavior
|January 1, 1996
PubMed
Summary
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Dairy cows exhibit undermatching behavior when choosing between food sources, allocating less time and effort than predicted by reinforcement schedules. This consistent pattern suggests underlying mechanisms independent of food type or pausing.

Area of Science:

  • Animal behavior
  • Behavioral economics
  • Operant conditioning

Background:

  • The generalized matching equation is a model used to describe choice behavior.
  • Undermatching, a deviation from matching, is frequently observed in animal studies.
  • Previous research has suggested potential causes for undermatching in dairy cows, such as food preference or pausing behavior.

Purpose of the Study:

  • To investigate the response and time allocation of dairy cows under concurrent variable-interval schedules of food delivery.
  • To analyze whether undermatching in dairy cows is influenced by the type of food offered or by time spent on non-food-related activities.

Main Methods:

  • Dairy cows were exposed to concurrent variable-interval schedules with different food options.
  • Response and time allocation were recorded and analyzed using the generalized matching equation.

Related Experiment Videos

  • Time spent on food-related and other activities was quantified through direct observation.

    • Main Results:

    • Dairy cows showed a preference for crushed barley over meatmeal.
    • Substantial undermatching was observed in both response and time allocation across experiments.
    • Time spent on non-food activities did not significantly alter the degree of undermatching.

    Conclusions:

    • Undermatching in dairy cows is a robust phenomenon, not solely explained by food preference or differential pausing.
    • The consistent undermatching suggests fundamental properties of choice behavior in this species.
    • Findings challenge previous explanations for undermatching in dairy cows and contribute to the understanding of behavioral allocation.