Can knowing less make you happier?

Hi readers! Shayla Love here, science journalist and longtime fan of Your Mileage May Vary. I’m honored to be subbing for Sigal Samuel while she’s out on parental leave. I’m diving into your questions as a way to help understand human nature and our choices through multiple lenses: philosophical, psychological, and beyond. Please send in any emotional, body/brain, sociological, perceptual, or other kind of life quandaries you might have.

I’m swimming in information. I have tracking apps to keep tally of my daily steps, minutes online, my calories, my sleep. Throughout the day, I am awash with data — some “actionable” and some useless. I find it a struggle to prioritize. I find myself looking up the latest betting odds for a Senate race in a state where I don’t live. (I didn’t bet on the race.) What I want to know is: What should I know less about? I’ve heard that ignorance is bliss, though I don’t often find that to be the case. But maybe I know too much, or…too little about how much to know?

Dear Un-blissfully Aware,

As a fellow know-it-all, I relate to your impulse to gather as much information as possible. I used to obstinately reject the idea that ignorance was bliss. Even if I learned something that was unpleasant, wouldn’t it be much worse not to know it?

But, as you may suspect from sharing my temperament in this arena, this approach to life can lead to hoarding knowledge like a frantic animal preparing for winter. You’re acquiring information as if it’s a scarce resource (which it’s not) and as if choosing to know something is neutral (it isn’t). What helped me understand the implications of this sort of approach was learning about the cases when people decided not to know, or the study of “deliberate ignorance.”

Several years ago, a psychologist, Ralph Hertwig, and lawyer, Christoph Engel, who both work at the Max Planck Institute in Berlin, examined what happened in the early 1990s, when the archives of East Germany’s secret police, the Stasi, opened to the public. Any person who had been living in the German Democratic Republic could check if they had been spied on. There was a pretty substantial catch, though: The spies were often “unofficial collaborators” — friends, family, teachers, or lovers who had been tasked with covertly collecting information. When the files were opened, many elected not to look. Hertwig and Engel estimated that potentially more people chose not to know what their files contained than those who did.

This goes against what we think we know about humans and how you have described yourself. Even Aristotle seemed quite certain that “all men naturally desire knowledge.” In the 1980s, the psychologist George Miller followed along in this line of thinking. He described humans as informavores: creatures with minds that constantly seek out and consume information. So, it can feel surprising to hear about occasions when people didn’t start grabbing for every available datapoint like squirrels dashing for acorns as the first winds of fall arrive.

But, as Hertwig and Engel — who collaborated on an entire book called Deliberate Ignorance: Choosing Not to Know — point out, we’re surrounded by people choosing ignorance all the time. They avoid looking at their bank statements, they skip doctor’s appointments, and they cover their ears and say “no spoilers” if someone is talking about a movie they haven’t yet seen.

Even Nobel Laureates do this. When James Watson, one of the co-discoverers of DNA’s double helix, had his own genome sequenced, he requested that a specific gene be left out: ApoE4, which can reveal an increased Alzheimer’s risk. Watson’s grandmother had Alzheimer’s, and her experience clearly made an impression on him. (Then, many in the scientific world tried to remain ignorant to Watson’s increasingly misogynistic and racist comments, until it was unignorable.)

Why do people choose not to know? The most common reason: Ignorance can be an extremely effective way to regulate any emotions that might crop up in response to knowledge. You can minimize negative feelings by, for example, not knowing that your otherwise friendly neighbor had been reporting on your comings and goings.

In a study about romantic relationships, a majority of people said they didn’t want to know if their partner had ever thought about cheating on them (but never acted on it). Other research showed that most people wouldn’t want to know the exact time of their death. Alternatively, someone could cultivate the feelings of joy and surprise by waiting to find out the sex of a baby until it’s born.

Deliberate ignorance can also be used to protect us from our biases. Scientists do blinded studies, because the knowledge of what drugs are being used can unwittingly change the outcomes or research. When orchestras implemented blind auditions, more women musicians were accepted.

Of course, deliberate ignorance can be problematic when it causes harm to yourself or others, like failing to gather basic information about your financial or physical health. In some cases, for instance, about 10 percent of people who got tested for HIV didn’t come back for their results — which could lead to further spread of the disease.

But when skipping out on knowledge doesn’t endanger you or those around you, it’s worth asking: How would this information make me feel?

This sounds like a question that’s missing from your information-ingestion habits. You don’t have to — and shouldn’t — ignore everything that comes across your desk. But your deliberate ignorance filter is turned entirely off; seemingly anything passes through it. To take just one of your examples, you mentioned fitness wearables. It can be useful to be aware of your general activity levels and your sleep, but honestly, don’t you already know enough from your memories of a workout class and how rested you feel in the morning? A quest for more detailed knowledge like this can backfire, making people more anxious, and disconnected from their actual physical experience.

It’s not just about how much knowledge to take in, it’s also about what kind. The breadth of information that you’re seeking out makes me wonder if you’re not already using knowledge to regulate your emotions by favoring superficial knowledge over the meaningful. When we face difficult tasks (even if they’re important, and we want to get them done), that’s usually when, suddenly, a Senate race in a far-off state starts to become interesting, or you find yourself scrolling a high school acquaintance’s wife’s Instagram.

In the 1990s, two technology researchers proposed the concept of “information foraging,” which was inspired by early user behavior on the web. A few years later, Webster’s dictionary announced that their word of the year was “infosnacking,” or mindless grazing for useless knowledge online in order to pass the time.

Snacking sometimes is fine, but you’ll start to suffer if you only eat chips for every meal rather than something more nutritious. I suspect you might be avoiding the slightly more challenging task of taking in other, more nutrient-dense knowledge. If you cut out the step tallies, screen minute totals, and news headlines scrolling, what could you choose to know instead?

What I’ve learned about myself is that I will always lean towards being an informavore. I can’t help it. I am hungry to know, and there is no need to totally overhaul this valuable part of who you are (as I also tell myself!). This means you don’t need to replace your infosnacking with zenfully staring at the ceiling or emptying your mind through meditation. You can still put new things into it! But you could worry less about your daily information calorie intake and spend more time thinking about the nutrition content of your knowledge diet.

Take a lesson from our many deliberately ignorant friends, and try disregarding some of the little stuff — the body tracking, the random factoids — for a period of time. But, at the same time, increase your knowledge about other subjects: a neglected hobby or a nonfiction book collecting dust on your shelf. Have a long conversation with your best friend and ask each other questions you’ve never asked before or interview an older relative about their childhood.

And remember that all of this knowledge relates back to your emotional life. Rather than asking yourself what you should or shouldn’t know, examine how you might be using knowledge to alter how you feel. Knowledge changes us. It can make us happy, anxious, excited, or sad; it impacts our decisions and how we see ourselves and other people.

In some of your newfound spaces of intentional ignorance, you may find just some surprising moments of bliss.

Bonus: What I’m reading