“The findings appear to support evidence… that expressions are potentially active attempts to communicate,” said study co-author Juliane Kaminski of the University of Portsmouth.
In a series of experiments with different types of pet dogs, the team discovered that the animals “move their faces” more when humans were paying attention to them.
Raising the brows, which makes the eyes appear bigger to produce heart-melting “puppy dog eyes”, was the most commonly-used expression, the researchers found.
