Study: Cats Use Facial Expressions To Reassure Each Other Everything’s Cool During Play Time

Once again, we’ve underestimated cats. There’s so much more to the ways in which they communicate than we realize.

We know cats use non-verbal signals to communicate with each other, but recent research suggests we may just be scratching the surface, glimpsing only a portion of the information that passes between our furry friends.

Cats “talk” to each other by the way they position their tails, whiskers and ears, in addition to their overall body language.

It turns out there’s more. A group of interdisciplinary scientists from universities in Kansas, Arkansas and Haifa, Israel, found cats also employ specific facial expressions, and rapidly mirror each other’s expressions during play time to signal they’ve got good intentions and aren’t going to hurt each other.

The study, which was given the yawn-inducing title “Computational investigation of the social function of domestic cat signals” (in English: using AI to figure out how our house cats “talk” to each other), started with observations of felines playing with each other in cat cafes.

From there, the coders and mathematicians on the team created an algorithm to record and sort the facial expressions the cafe cats used, employing CatFACS (Cat Facial Action Coding System) to associate each expression with its meaning.

“I’m serious. Feed me, or feel my wrath.”

Cats make a surprising number of facial expressions, 276 in total, according to a 2023 study.

The problem is, we humans are terrible at reading them. Even veterinarians trained in CatFACS still struggle to get it right, but happily this is precisely the sort of task algorithmic AI excels at. Like facial recognition software, a well-trained machine learning algorithm can recognize faces and record them more accurately and much faster than any person could.

In a column praising the facial expressions study, evolutionary biologist and Jane Goodall Foundation ethics board member Mark Bekoff said it’s the kind of labor-intensive work that truly advances our understanding of the ways animals communicate.

For cats and their human caretakers, Bekoff notes, it could help us reduce inter-species misunderstandings and make it easier to read our cat’s emotions, so we know when they’re not feeling well or need something.

“There are no substitutes for doing what’s needed to learn about the nitty-gritty details of how animals communicate with one another in different contexts,” Bekoff wrote. “This study of play opens the door for more widespread comparative research focusing on how animals talk to one another.”

“Do I look happy, human?” Credit: Milan Nykodym/Wikimedia Commons

We also know adult cats very rarely meow to each other, and the meow is reserved for cat-to-human communication. Imagine the frustration our little friends must feel when they have so much to tell us, but the only thing we understand are vocalizations — meows, chirps and trills — that can convey only basic ideas at best.

New York Times Ethicist: ‘My Boyfriend Said He’d Save Our Cat but Not a Stranger if Both Were Drowning’

As Charles Darwin pointed out, the difference between humans and animals is one of degree, not kind. That should factor into discussions on the value of animal life.

The headline — ‘My Boyfriend Said  He’d Save Our Cat but Not a Stranger if Both Were Drowning’ — comes from the New York Times via its Ethicist column, in which NYU philosophy professor Kwame Anthony Appiah answers questions from readers about moral rights and wrongs.

Here’s the full text of the question:

My boyfriend and I were talking about protecting human life, and he said that he doesn’t believe that human life is necessarily worth more than any other kind of life. For example, he said that if one of our cats were drowning next to a human who was a stranger to us (who was also drowning) and he could save just one, he would choose our cat. Is this morally wrong?

Appiah, in his very first sentence in response, regretfully calls pets “fictive kin” before pointing to a study by an experimental psychologist in which participants were asked whether they’d save their pets or a foreign tourist if both stepped in front of a bus at the same time. Forty percent of respondents picked the pet.

To his credit, Appiah notes the people who chose their pets don’t have “some grave defect of character,” and said the impulse to save a companion pet is “very human,” given all we share with our animals, including “affection, companionship, loyalty, all twined around a whole lot of memories.”

Buddy
“Buddy sad. Buddy needs snack.”

That said, Appiah says human life is more valuable:

“But yes, it’s very wrong. (In states with “duty to rescue” laws, it could be illegal too.) Those human strangers? They had rich emotional lives and they had plans, short-term and long-term, big and small; it’s a good guess that they were also part of other people’s plans, other people’s emotional lives.”

I’m not going to get into the question of whether human or animal life has more value. That’s a mine field, I don’t subscribe to the idea that we should work out hierarchies of life’s value as if we’re ranking favorite ice cream flavors, and it seems to me these “what if?” questions involving oncoming buses or trains don’t have much value in gauging reality.

After all, how many people do you know were forced to make life or death decisions in a millisecond, let alone decisions involving a complex moral and emotional calculus? Appiah seems to agree, while also pointing out that what people say in a questionnaire doesn’t necessarily predict what they’d do in the moment.

Life is life. It’s all valuable, and the survey doesn’t have much use outside the classroom or ethics columns.

Buddy the Handsome Cat
Buddy the Cat: Brains as well as brawn.

However, I do think it’s worth pointing out that much of what Appiah assumes is the difference between human and animal life — particularly rich emotional lives, cognition and value to others — can indeed be attributed to animals.

There’s been a seismic shift in the way most scientists view animal cognition over the past decade, and in many ways the acknowledgement of non-human sentience and potential sapience is long overdue  — there are literally thousands of studies confirming animals are conscious, sentient, and possessed of the full range of primary and secondary emotions.

Every time we set new barriers for what distinguishes human from non-human, we’re forced to change the goalposts. When behaviorism was the dominant model, the distinction was internal thought processes. In dismantling behaviorism, Noam Chomsky helped launch the cognitive revolution. Then it was  emotion and love, which crumbled with the ugly Harry Harlow studies into maternal deprivation in monkeys. Then it was capacity to reason, tool use, innovation — and every time, we’ve revised our definitions, solid in our conviction that we’re fundamentally different.

In fact, the only thing that’s held up is Charles Darwin’s original observation in 1871 that “the difference in mind between man and the higher animals, great as it is, certainly is one of degree and not of kind.”

In other words, humans aren’t some higher order of being. We are animals. Upjumped animals in some sense, but animals all the same, subject to the same diseases, physical limitations and helplessness in the face of greater forces like nature.

We may live in an age when our planet is blanketed in satellites, scientists are on fusion’s doorstep and each one of us has the entire sum of our species’ knowledge at our fingertips, but it’s shocking how quickly the veneer of civilization can collapse when people are scared, the food runs out, social order breaks down and those primal motivations — the ones we think we’ve out-evolved — drive our actions again. The early days of the COVID pandemic was just a small reminder of that.

We don’t like talking about these uncomfortable truths because they lead to more uncomfortable truths about the billions of non-human minds we share the planet with, and how we treat them.

I can’t claim to be a philosopher, although I minored in the subject over the objections of my advisor. (He should have warned me off journalism!) But when it comes to animal cognition I do have a great teacher, an 11-pound ball of fur who won’t let me forget he’s got his own wants, needs and strong emotions. Doesn’t he deserve consideration too?

Can Cats Feel Jealousy?

While the answer is obvious to cat servants, proving feline jealousy in a study is a different ballgame entirely.

Bud isn’t fond of my smartphone.

Like many other humans I spend too much time looking at the damn thing, and that’s not good even though I have the excuse that I use my phone as a reader and my presence on social media ranges from extremely limited to nonexistent.

When His Grace has decided I’ve looked at the screen long enough and it’s Buddy Time, he’ll pad up and slap the phone out of my hands, or if I’m laying down he’ll climb on top of me, nudge the phone out of the way and sit on my chest so he has my full attention.

“No glowing rectangle!” he’s saying. “It’s Buddy Time! Now scratch my chin and rub the top of my head as I purr!”

Naturally I comply, and before long Buddy is leaning in, pressing the top of his head against my forehead, which is his way of saying: “I love you, slow dumb human! You have many flaws and you don’t give me enough snacks, but you’re my Big Buddy!”

Of course, intuitively knowing Buddy is jealous of — or annoyed by — my phone is different than proving it in a well-designed, repeatable experiment.

Psychology Today’s Jessica Wu writes about just such an effort by a team of researchers out of Japan.

Before I offer my criticism of the study, let me first say I have respect for the team at Kyoto University. They’re one of a handful of research teams around the world that routinely produce studies into cat behavior and cognition, and it’s clear that they view it as an important and crucial area of research. That’s significant, because even though we’ve seen something of a renaissance in cat-related studies over the past half-decade or so, many scientists still think cats are nearly impossible to work with.

The team at Kyoto also understands the territorial nature of cats makes it difficult to study them in a lab environment, so they go the extra mile and enlist people who are willing to let them into their homes to study their little tigers.

That’s what the Kyoto team did for their 2020 study on jealousy, splitting their research between typical homes and cat cafes. (Fifty two cats in total participated.) All the cats observed in the study had been living in their homes or cafes for at least six months.

Researchers took a method that’s been used to study human babies and dogs, and adapted it for felines. They brought in a plush cat and a pillow with a corresponding color and texture.

https://youtu.be/VSSt-YtZo58

Then they asked the participants to spend time petting the plush cat and the pillow in front of their furry overlords while team members carefully watched the kitties for their reaction. Each experiment was then repeated with a stranger petting the plush and the pillow to gauge whether cats behaved differently when observing someone they aren’t emotionally attached to.

The team found the cats “reacted more intensely” to the plush cats than the pillows, but there wasn’t any marked difference in how they reacted when they watched their humans versus strangers.

Crucially, the cats didn’t show signs that they were upset, like human babies have in such experiments, and they didn’t try to physically separate their humans from the plushies, as many dogs did in their version of the experiment.

jealous-cat
“How dare you hand out yums and not include me!” Credit: icanhazcheezburger

The results indicate cats didn’t express jealousy in the experiment, but the Kyoto team are pros, noting that it’s just one study with one approach.

“We consider the existence of some cognitive bases for jealousy to emerge in cats, and the potential effect of cats’ living environment on the nature of their attachment to their owner,” they wrote. “More ecologically valid procedures are required for further study of these issues.”

It’s my non-expert, non-scientific opinion that researchers would get better results using actual cats instead of proxies. That introduces a new set of problems and an experiment involving rival cats won’t be easy, but science isn’t supposed to be easy, and if we really want to understand how cats think, we have to get as close as possible to mimicking real circumstances.

Plush Cat in Kyoto study
The plush cat used in the Kyoto study. Perhaps the cats involved in the research felt the humans were insulting their intelligence. Credit: Kyoto University

It would also help to expand the scope of the experiment. How much can researchers really glean from a fleeting interaction? Jealousy isn’t something that just bubbles up and disappears. It happens within an emotional context. It’s a secondary emotion that sprouts from elements of primary emotions like fear, anger and confusion.

Scientists are very careful about anthropomorphizing animals, for obvious reasons, but sometimes they’re guilty of over-correcting as well and denying the obvious, which is why the prevailing scientific opinion for almost half a century, until 1959, was that animals don’t have emotions or cognition.

In the meantime, Buddy will continue to make sure Buddy Time is equal to, or greater than, glowing rectangle time.

How Much Can AI Teach You About Your Cat?

A new AI algorithm promises to help you gauge your cat’s mood — and determine if she’s in pain — by analyzing facial expressions.

In the photograph, Buddy is sitting on the coffee table in the classic feline upright pose, tail resting to one side with a looping tip, looking directly at me.

The corners of his mouth curve up in what looks like a smile, his eyes are wide and attentive, and his whiskers are relaxed.

He looks to me like a happy cat.

Tably agrees: “Current mood of your cat: Happy. We’re 96% sure.”

Screenshot_20210730-092555

Tably is a new app, currently in beta. Like MeowTalk, Tably uses machine learning and an algorithmic AI to determine a cat’s mood.

Unlike MeowTalk, which deals exclusively with feline vocalizations, Tably relies on technology similar to facial recognition software to map your cat’s face. It doesn’t try to reinvent the wheel when it comes to interpreting what facial expressions mean — it compares the cats it analyzes to the Feline Grimace Scale, a veterinary tool developed following years of research and first published as part of a peer-reviewed paper in 2019.

The Feline Grimace Scale analyzes a cat’s eyes, ears, whiskers, muzzle and overall facial expression to determine if the cat is happy, neutral, bothered by something minor, or in genuine pain.

It’s designed as an objective tool to evaluate cats, who are notoriously adept at hiding pain for evolutionary reasons. (A sick or injured cat is a much easier target for predators.)

But the Feline Grimace Scale is for veterinarians, not caretakers. It’s difficult to make any sense of it without training and experience.

That’s where Tably comes in: It makes the Feline Grimace Scale accessible to caretakers, giving us another tool to gauge our cats’ happiness and physical condition. With Tably we don’t have to go through years of veterinary training to glean information from our cats’ expressions, because the software is doing it for us.

Meanwhile, I used MeowTalk early in the morning a few days ago when Buddy kept meowing insistently at me. When Bud wants something he tends to sound whiny, almost unhappy. Most of the time I can tell what he wants, but sometimes he seems frustrated that his slow human isn’t understanding him.

I had put down a fresh bowl of wet food and fresh water minutes earlier. His litter box was clean. He had time to relax on the balcony the previous night in addition to play time with his laser toy.

So what did Buddy want? Just some attention and affection, apparently:

Screenshot_20210801-181618

I’m still not sure why Buddy apparently speaks in dialogue lifted from a cheesy romance novel, but I suppose the important thing is getting an accurate sense of his mood. 🙂

So with these tools now at our disposal, how much can artificial intelligence really tell us about our cats?

As always, there should be a disclaimer here: AI is a misnomer when it comes to machine learning algorithms, which are not actually intelligent.

It’s more accurate to think of these tools as software that learns to analyze a very specific kind of data and output it in a way that’s useful and makes sense to the end users. (In this case the end users are us cat servants.)

Like all machine learning algorithms, they must be “trained.” If you want your algorithm to read feline faces, you’ve got to feed it images of cats by the tens of thousands, hundreds of thousands or even by the millions. The more cat faces the software sees, the better it gets at recognizing when something looks off.

At this point, it’s difficult to say how much insight these tools provide. Personally I feel they’ve helped me understand my cat better, but I also realize it’s early days and this kind of software improves when more people use it, providing data and feedback. (Think of it like Waze, which works well because 140 million drivers have it enabled when they’re behind the wheel and feeding real-time data to the server.)

I was surprised when, in response to my earlier posts about MeowTalk and similar efforts, most of PITB’s readers didn’t seem to share the same enthusiasm.

And that, I think, is the key here: Managing expectations. When I downloaded Waze for the first time it had just launched and was pretty much useless. Months later, with a healthy user base, it became the best thing to happen to vehicle navigation since the first GPS units replaced those bulky maps we all relied on. Waze doesn’t just give you information — it analyzes real-time traffic data and finds alternate routes, taking you around construction zones, car accident scenes, clogged highways and congested shopping districts. Waze will even route you around unplowed or poorly plowed streets in a snowstorm.

If Tably and MeowTalk seem underwhelming to you, give them time. If enough of us embrace the technology, it will mature and we’ll have powerful new tools that not only help us find problems before they become serious, but also help us better understand our feline overlords — and strengthen the bonds we share with them.

Buddy is bored
Buddy’s bored of all this AI talk and wants a snack.