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Control of response duration by delayed reinforcers: A systematic replication.

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Area of Science:

  • Behavioral science
  • Animal behavior
  • Operant conditioning

Background:

  • Delayed reinforcement is a key concept in behavioral psychology.
  • Understanding how reinforcement schedules affect response duration is crucial for behavioral analysis.

Purpose of the Study:

  • To investigate the effects of delayed reinforcement schedules on lever-press durations in rats.
  • To determine if response rate and response duration can be independently manipulated.

Main Methods:

  • Three rats were trained under fixed-ratio 1 schedules.
  • Unsignaled delayed reinforcement was delivered based on lever-press durations exceeding or falling under a specific value (1s).
  • Response rates and durations were recorded and compared across conditions.

Main Results:

  • All rats increased response durations when reinforcement was contingent on durations exceeding 1s.
  • Two rats decreased response durations when reinforcement was contingent on durations less than 1s.
  • Extinction reduced response rate but did not impact response duration.

Conclusions:

  • Unsignaled delayed reinforcement can alter response durations in a targeted manner.
  • The rate-decreasing effects of delayed reinforcement appear separable from its effects on response duration.
  • These findings contribute to understanding the complex interplay of reinforcement schedules and continuous response dimensions.