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Related Experiment Videos

Rats' performance on variable-interval schedules with a linear feedback loop between response rate and reinforcement

Phil Reed1, Tom Hildebrandt, Julie DeJongh

  • 1Department of Psychology, University College London, United Kingdom. p.reed@ucl.ac.uk

Journal of the Experimental Analysis of Behavior
|June 26, 2003
PubMed
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Rats do not appear sensitive to the feedback function of variable-interval (VI+) schedules. Studies found no difference in response rates between VI+ and yoked VI schedules, suggesting rats do not use this information.

Area of Science:

  • Behavioral psychology
  • Animal behavior research
  • Operant conditioning

Background:

  • Understanding reinforcement schedules is crucial in behavioral psychology.
  • Variable-interval (VI) schedules traditionally link time to reinforcement.
  • The role of feedback functions in reinforcement is less understood.

Purpose of the Study:

  • To investigate rat sensitivity to the molar properties of variable-interval schedules with positive feedback functions (VI+).
  • To determine if rats utilize the relationship between response rate and reinforcement rate.

Main Methods:

  • Three experiments compared rat responding under VI+ schedules versus other schedules (VR, yoked VI).
  • Response rates and reinforced interresponse times (IRTs) were measured.

Related Experiment Videos

  • Yoking procedures were employed both between- and within-subjects.

    • Main Results:

    • Rats responded faster on variable ratio (VR) schedules than VI+ schedules.
    • No systematic differences in response rates were found between VI+ and yoked VI schedules.
    • While mean reinforced IRTs were similar, they were more variable under VI+ schedules.

    Conclusions:

    • The study found no evidence that rats are sensitive to the feedback function of VI+ schedules.
    • Rats' behavior did not systematically differ based on the response-reinforcement rate relationship.
    • Further research may explore other factors influencing behavior under complex schedules.