Low-response-rate conditioning history and fixed-interval responding in rats

Area of Science:

• Behavioral neuroscience
• Animal learning and behavior

Background:

• Reinforcement schedules shape animal behavior.
• Understanding response rate dependencies is crucial for behavioral analysis.

Purpose of the Study:

• To investigate the influence of prior conditioning history on fixed-interval schedule performance in rats.
• To determine if low-rate conditioning history affects subsequent fixed-interval responding.

Main Methods:

• Two groups of rats were conditioned under different reinforcement schedules.
• Group 1: Differential-reinforcement-of-low-rate (DRL) followed by fixed-interval (FI).
• Group 2: DRL, then fixed-ratio (FR), followed by FI.

Main Results:

• Low response rates under FI were observed only when immediately preceded by DRL conditioning.
• When DRL was followed by FR before FI, FI responding resembled FR responding.
• Rats' fixed-interval responding is influenced by the most recent conditioning history.

Conclusions:

• Laboratory animal responses are sensitive to immediate conditioning history.
• Prior low-rate conditioning has limited impact on subsequent fixed-interval responding if followed by high-rate conditioning.