Cats are often seen as mysterious or hard to read, but they are actually sending clear signals if you know how to look. New research confirms that you can build a stronger bond with your feline friend by using a specific facial expression. A study by psychologists at the Universities of Sussex and Portsmouth reveals that the “slow blink” is a powerful way to communicate friendliness and build trust with cats.
The science behind the “cat smile”
If you spend time around cats, you have likely noticed a specific facial expression where they look at you with half-closed eyes. This is often followed by a slow and deliberate blink. This expression typically happens when the cat is relaxed and content.
Scientists have found evidence that this slow blinking sequence functions as a form of positive emotional communication between cats and humans. The study was led by Professor Karen McComb and Dr. Tasmin Humphrey from the University of Sussex. They are both animal behavior experts and cat owners.
They suggest that this eye narrowing movement is the feline equivalent of a human smile. It mimics the genuine human smile that crinkles the corners of the eyes. By copying this face, humans can tell cats that their intentions are benign.
How the experiments proved it works
The research team designed two experiments to test whether slow blinking really changes how cats behave toward humans.
Experiment 1: Owners and their cats
In the first test, the team observed 21 cats from 14 different households in their own homes. The owners were instructed to sit about one meter away from their relaxed cat and perform a slow blink sequence.
The results showed that cats were significantly more likely to slow blink back at their owners after the owner had slow blinked at them. This was compared to when the owner just sat there without interacting.
Experiment 2: Strangers and approaching hands
The second experiment tested whether the trick worked with strangers. A researcher who the cats had never met visited 24 cats from 8 households. The researcher either slow blinked or adopted a neutral face without eye contact.
The researchers found that cats were more likely to approach the stranger’s outstretched hand after a slow blink interaction. When the stranger maintained a neutral expression, the cats were more likely to stay away.
Why slow blinking builds trust
Cats are often sensitive to direct staring. In the animal kingdom, a prolonged stare can be interpreted as a threat or a challenge. A wide eyed stare can trigger a flight or fight response in many species.
The slow blink breaks this stare. By narrowing your eyes, you interrupt the threatening signal and show the cat that you are not dangerous. It is a sign of vulnerability and trust that invites the cat to relax.
Dr. Tasmin Humphrey suggests that understanding these signals can improve feline welfare. It gives vets, shelter staff, and owners a tool to soothe anxious cats and assess their emotional state. Related research has shown that shelter cats who slow blink are rehomed faster than those who do not.
What you can do about it
You can try this technique immediately with your own pet or even with cats you meet outside.
- Relax your face: Soften your expression and look at the cat.
- Narrow your eyes: Lower your eyelids as if you are smiling warmly.
- Close and open slowly: Close your eyes for a couple of seconds. Open them again slowly.
- Wait for a response: Watch to see if the cat returns the gesture.
This simple interaction can help you bond with your pet. It makes strange cats feel safer around you. It is a way to tell them you are friendly in a language they instinctively understand. You can also look for other genetic traits that define cat appearance to better understand their biology.
Sources & related information
Scientific Reports – The role of cat eye narrowing movements in cat–human communication – 2020
Researchers from the University of Sussex demonstrate that slow blinking sequences function as a form of positive emotional communication between cats and humans. The study found that cats are more likely to approach a stranger who slow blinks than one with a neutral expression.
Animals (MDPI) – Slow Blink Eye Closure in Shelter Cats Is Related to Quicker Adoption – 2020
A related study by the same research team found that shelter cats who responded to human slow blinking were adopted more quickly. This suggests that humans also perceive the slow blink as a positive social signal from cats.
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