Chimpanzees ( Pan troglodytes) coordinate by communicating in a collaborative problem-solving task.

Area of Science:

• Primate behavior
• Animal communication
• Cognitive ethology

Background:

• Collaboration is vital for many species.
• Chimpanzee communication research is extensive but lacks evidence of natural regulation of collaborative activities.
• This study addresses the gap in understanding chimpanzee's innate collaborative communication skills.

Purpose of the Study:

• To investigate if chimpanzee pairs can communicate to coordinate actions during a collaborative problem-solving task.
• To determine if chimpanzees possess natural communicative strategies for task coordination without extensive human training.

Main Methods:

• Pairs of chimpanzees were presented with a problem requiring two tools to access rewards.
• A 'communicator' chimpanzee knew the tool locations, while a 'recipient' chimpanzee could access them.
• Initial tests confirmed chimpanzees understood human pointing gestures before conspecific tests.

Main Results:

• Communicator chimpanzees increasingly signaled tool locations to recipients through gestures and offering keys.
• Recipient chimpanzees used these signals to retrieve tools and facilitate collaborative reward extraction.
• Pairs successfully coordinated actions, demonstrating effective communication for task completion.

Conclusions:

• Chimpanzees possess the socio-cognitive abilities for natural, simple communication strategies.
• These findings suggest an innate capacity for developing communication to ensure coordination in collaborative tasks.
• The study provides evidence for sophisticated communication in chimpanzees beyond basic signaling.