Simultaneous processing of short delays and higher order temporal intervals within a session by pigeons

Area of Science:

• Animal Cognition
• Behavioral Neuroscience
• Comparative Psychology

Background:

• Foraging behavior relies on processing temporal information at various scales.
• Understanding interval timing is crucial for explaining decision-making in animals.

Purpose of the Study:

• To investigate pigeons' ability to process two distinct temporal intervals simultaneously.
• To examine how pigeons discriminate between short within-trial and long between-trial reinforcement schedules.

Main Methods:

• Pigeons were trained on a chained variable interval (VI) 5 s-fixed interval (FI) 10 s reinforcement schedule.
• A large reinforcer was delivered at either 6 or 16 minutes within 20-minute sessions.
• Probe sessions without the large reinforcer assessed response rates.

Main Results:

• Pigeons exhibited a peak in responding around 6 minutes after training with an early large reinforcer.
• Response rates increased linearly after training with a late large reinforcer.
• Pigeons accurately timed the 10-second fixed interval within trials.

Conclusions:

• Pigeons demonstrate the capacity to process and discriminate between multiple temporal intervals.
• Findings support timing models involving multiple accumulators for complex interval processing.
• This research provides insights into the cognitive mechanisms underlying foraging decisions.