How to Read Personality Compatibility With Friends
Our Chemistry Through Outer & Private Self
If a trip with a friend you've always clicked with got bumpy, you were only seeing half of your compatibility. Here's how to read friendship compatibility by laying your social selves and your private selves over each other, and how to turn the results into a conversation you have together.
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You met as new hires at the same company and have eaten lunch together for three years. You agree on the menu without a word, and after a meeting one glance tells you what the other is thinking. So the two of you set off on your first trip together, four days and three nights, and from the evening of the second day the air feels off. Your friend showed up with an hour-by-hour itinerary, while you wanted to take it slow where you were staying. Your friend hits it off with new people everywhere you go, while you get quieter as evening falls. On the way home, you were both silent. And you were supposed to be such a good match.
This doesn't happen because the friendship is fake. You'd simply only known half of each other. Personality compatibility becomes fairly clear once you look at where two people's temperaments are alike and where they collide, and between friends in particular, you only see it properly when you lay the social self and the private self over each other.
Most friendships start with your social selves
We usually meet friends in places full of people: classrooms, offices, clubs. In those places we move as the self we are around people, our social self. So the first compatibility in a friendship is between two social selves. If you both read the room well and both seem high in sociability, you get close fast.
The private self only comes out in certain settings. When you spend long stretches one-on-one, when you share daily life on a trip or living together, when one of you is going through a hard time. That's when you first see who each of you is when alone. An private self who comes with an itinerary and an private self who loves spontaneity; an private self who needs to recharge alone in the evening and an private self who wants to talk late into the night.
When things suddenly get bumpy with a friend you've gotten along with for years, it's usually because your private selves are colliding for the first time in one of these settings. Your friend hasn't changed; you're just seeing a side that was always there for the first time. On the other hand, if you have a friend who seemed distant at first but became your closest after the two of you pulled an all-nighter on a group project, that's a case where your private selves clicked first.
Lay social and private selves together, and four kinds of friends appear
If you lay whether two people's social selves fit over whether their private selves fit, friendships split into four kinds.
| Your combination | Your private selves click | Your private selves clash |
|---|---|---|
| Your social selves click | The old friend who's easy to be with anywhere | The friend who's great in a group but gets bumpy on a trip for two |
| Your social selves clash | The friend who felt awkward at first but turns out to be a perfect match | A relationship you don't need to force |
No box is good or bad. The friend in the top-right box is the most fun person at any gathering, and the friend in the bottom-left takes a long time to get close to, but once you're close it runs deep. What matters is knowing which box you're in and choosing settings that suit it. With a top-right friend, a half-day outing works better than a long trip; with a bottom-left friend, dinner for two works better than a big gathering.
Three places friendships often get bumpy
Differences between private selves usually show up first in three places.
The rhythm of keeping in touch. People who recharge among others respond right away in group chats and find it natural to trade updates on weekends too. People who recharge alone keep their phones at a distance on days off and reply in batches. One side easily feels “Why did they read it and not answer?”, and the other feels “Do I really have to reply on my day off?”
How you treat plans. For someone who makes plans and sticks to them, a plan that changes on the day shakes up the whole day. For someone comfortable with spontaneity, “See you later, then” is the most natural kind of plan. Neither is wrong; the word “plan” just carries a different weight for each of you.
Comfort in hard times. People with a wide emotional amplitude feel comforted by a friend who gets upset right alongside them. People with a narrow amplitude tend to offer solutions first as their way of comforting. So one person tried hard to help and gets told they were hurtful, while the other opened up and ended up feeling scolded.
How to check compatibility with a friend
- First, check your own social self and private self with the free personality test. It has 83 questions and shows the you around people and the you alone separately.
- Send the share card from your results screen to your friend.
- Once your friend finishes the test too, your compatibility is laid out side by side.
When your compatibility comes up, before looking at the score, set your two results side by side and look at three things. First, is there a place where your social selves are similar but your private selves differ? That's where you'll bump into each other on trips or over long stretches together. Second, is there a place where only one of you has a big gap between social self and private self? That friend is a fairly different person in a group than one-on-one. Third, how different are your emotional amplitudes? This is what decides how you should comfort each other in hard times.
For example, if both of your social selves recharge among people but only one of your private selves leans toward recharging alone, you'll both have a blast at gatherings, but around day three of a trip one of you will run out of steam first. What would have been hurt feelings before you saw the results becomes something you can see coming once you have.
Five ways to turn compatibility into conversation
- Trade inner-self questions before spending long stretches together. Before a trip or moving in together, ask “On trips, are you a morning person or a night person?”, “Do you need some time alone each day?”, and “Do you like to plan the itinerary ahead?” Knowing just these three takes a lot of the awkwardness out of that second evening.
- Build time apart into your time together. When you plan a trip, leave blank spaces ahead of time, like “Let's each do our own thing on the second afternoon and meet up for dinner.” The friend who needs to recharge alone gets to catch their breath, and the friend who wants to keep exploring can roam as much as they like. That half day apart makes the rest of the trip much more comfortable.
- Talk about just the one place you differ most. Rather than deciding who comes out better from the results, point to the one place you differ most, like “We're both lively when we're out, but when I'm alone I go completely quiet.” It turns into a conversation where you introduce each other to private selves you never knew.
- Reframe hurt feelings as a difference in temperament. When “Why do you never reply on weekends?” comes to mind, try thinking instead, “This friend is someone who keeps their phone at a distance when they're alone.” The same thing moves from hurt to understanding.
- Give each friend the setting that suits them. You don't have to do everything with every friend. It's fine to have a friend who's great at gatherings, a friend for deep one-on-one talks, and a friend who's great to travel with. When you don't expect one friend to fill every role, friendships actually last longer.
How not to read this
Please don't use compatibility results to cut friends off or rank them. A low score doesn't mean the friendship is weak, and a high score doesn't mean there'll never be hurt feelings. The years you've spent together and the things you've done for each other don't fit on a single results card. If you've gotten along well for a long time with a friend you scored low with, it also means the two of you have already learned how to handle your differences. And before posting your results in a group chat, check first that your friend is okay with it. Compatibility isn't a score for grading friends; it's a map for misunderstanding each other less.
Knowing the two of you a little better
Enjoy the parts that fit even more, and accept the parts that clash with “it's not that they're a bad person, we just have different temperaments,” and friendships get a lot easier. If you're curious why a different you comes out with different people, read A different me pops out with different people, and if you have lots of friends yet still feel strangely empty, read Lonely even with many friends too.
You could start today by sending a share card to your oldest friend. You might meet, for the first time, the private self of a friend you've known for years.
This piece is meant to help you understand relationships, not to serve as grounds for judging your friends.
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