Spontaneous Metacognition in Rhesus Monkeys

Area of Science:

• Cognitive Science
• Animal Behavior
• Evolutionary Psychology

Background:

• Metacognition, the ability to think about thinking, is crucial for human knowledge monitoring.
• The evolutionary origins of metacognition in non-human animals remain largely unexplored.
• Understanding metacognitive capabilities in primates can shed light on cognitive evolution.

Purpose of the Study:

• To investigate metacognitive inference in rhesus monkeys (Macaca mulatta).
• To determine if monkeys exhibit information-seeking behavior based on their knowledge state.
• To explore the potential for non-human metacognition in naturalistic foraging tasks.

Main Methods:

• 120 rhesus monkeys participated in a one-shot decision-making task.
• Monkeys observed a human hiding a food reward in a two-tube apparatus.
• Experimental conditions varied visibility of the hiding event and possibility of information seeking.

Main Results:

• Monkeys generally searched the correct location after observing the baiting event.
• When their view was occluded, monkeys actively sought information by peering into a central location.
• Information-seeking behavior was significantly reduced when the center location was not accessible.

Conclusions:

• Rhesus monkeys spontaneously use information about their own knowledge states.
• This study provides the first evidence of non-human information-seeking responses in novel situations.
• Findings suggest that metacognitive abilities may have deeper evolutionary roots than previously thought.