Temporal Structure of Reward Availability and Sensory Uncertainty Modulate Allocation Dynamics in Naturalistic...

Area of Science:

• Behavioral neuroscience
• Animal cognition
• Foraging behavior

Background:

• Adaptive foraging integrates sensory information with reward timing predictions.
• Previous models lack clarity on how reward timing and cue reliability influence foraging decisions.

Purpose of the Study:

• To investigate how reward timing predictability and sensory cue reliability affect animal foraging behavior.
• To examine macaque monkey responses in a continuous foraging task with variable reward schedules and cue reliability.

Main Methods:

• Developed a continuous foraging task with three reward patches for macaque monkeys.
• Manipulated reward availability schedules (exponential vs. gamma distributions) and visual cue reliability.
• Monitored monkey navigation and patch choices to analyze behavioral allocation.

Main Results:

• Under exponential schedules, monkeys allocated time based on reward rates; cue reliability had minor effects.
• Under gamma schedules, monkeys learned patch differences faster and prioritized predicted reward timing.
• Behavioral choices were more influenced by predicted timing with highly reliable sensory cues.

Conclusions:

• Both reward timing predictability and sensory cue reliability significantly shape foraging effort allocation.
• Animals adjust their strategies based on the structure of reward schedules and cue dependability.
• Findings provide insights into adaptive decision-making in complex, naturalistic environments.