What Dogs Can Teach Us About the Origins of Speech

• Dogs have evolved alongside humans for over 14,000 years, developing unique social cognitive abilities that may provide clues into how human spoken language originated.
• The EU-funded K9VocLearn project is investigating whether domestication influenced how dogs use their voices and if this mirrors the evolutionary steps taken by humans.
• Researchers are exploring the link between domestic cooperation and "vocal learning," the ability to modify vocalizations by listening to others.

Research Context and Hypothesis

• Vocal learning is a prerequisite for spoken language, allowing humans to deliberately produce a vast range of sounds; most mammals have limited flexibility in this regard.
• Dogs were selectively bred for tameness and cooperation, traits the team believes may have influenced their ability to control their vocalizations.
• The study connects to the "self-domestication hypothesis," which suggests that increased social tolerance in human evolution favored more flexible communication, similar to changes observed in domesticated animals.
• Research indicates that dogs have evolved to bark in almost any situation, a shift from ancestral wolf behavior, potentially because early humans favored vocal alarm-raising.

Laboratory and Training Methods

• The Budapest BARKS Lab observes dogs in various emotional scenarios, recording heart rates and behaviors to map vocalizations to emotional states.
• Led by geneticist and dog trainer Dr. Sára Sándor, the project utilizes "consent-based" training, allowing dogs to signal when they are tired or stressed to ensure they are not forced to participate.
• The focus is not to teach dogs to "talk," but to determine if they can produce specific sounds voluntarily—such as a whine—on cue without the usual trigger.

Applications and Future Research

• The team plans to expand data collection through a global citizen science project, gathering DNA samples and recordings of natural dog sounds from owners worldwide.
• Findings could lead to AI-powered smart devices capable of detecting canine emotions, helping owners recognize fear or stress to improve animal welfare.
• Understanding how domestication provided dogs with a more flexible voice could fill a missing piece in the evolutionary puzzle of how humans developed speech.