IPIP-NEO

Personality test for couples

Compare your personalities: a Big Five test for two

Each of you takes the same scientific personality test on your own, by link, whenever it suits you. Then you see both profiles on one scale: where you are alike, where you differ and which differences are worth talking about.

Take the test and invite your partnerI already have a result
  • The comparison is free
  • Your partner does not need to sign up
  • No compatibility percentage

How it works

Three steps, and the two of you never need to be online at the same time.

  1. 1

    Take the test

    Choose the short version (120 questions, about 15 minutes) or the full one (300 questions, about 40 minutes). Your result is free and stays yours.

  2. 2

    Invite your partner

    On your result page, press Invite my partner and send the link any way you like. Your partner takes the test from that link on any device, today or next week.

  3. 3

    Compare

    When your partner finishes and agrees to compare, both of you see the two profiles side by side. Scores only: neither of you sees the other person’s answers.

The comparison of five traits and thirty facets is free. The full comparison, eight sections about everyday life together, opens by itself once each of you has the full report of your own result.

Already took the test?

Open your result: from the link you saved, from the email with your full report, or from My results if you have an account. Under your profile you will find the block Compare profiles with your partner. Press Invite my partner there.

Go to My results

What you will see

A real comparison of two invented profiles, built by the same code that will build yours. The radar shows both people on one scale, and below it you see what stands out in the pair and what one of the traits means for the two of them.

Comparison
AlexSam
Invented profiles, for illustration.

Five traits

NACEO

Your pair at a glance

Where you are closest

AgreeablenessAlmost the same

A similar balance of warmth and firmness

Where you differ most

ConscientiousnessDifferent

One plans, one improvises

Almost the same

11

of 30 facets

Clearly different

8

of 30 facets

Conscientiousness

Different
Alex: 34Sam: 77

Higher:Sam

One plans, one improvises

On average, the two of you sit on the organized side of the scale, but one of you likes plans, order and clarity noticeably more, while the other handles uncertainty more easily and decides on the go. The difference works well when it is acknowledged: one holds the structure, the other brings flexibility when the plan breaks. Arguments start when the planner sees improvising as not taking things seriously, and the improviser sees plans as control.

Worth agreeing on: Agree on what gets planned in advance (trips, big purchases, visits) and what is decided on the go. When the line is clear, nobody feels pressured.

What matters in a couple, according to research

Studies with tens of thousands of couples point in the same direction, and it is not the direction most compatibility tests promise.

01

Most couples are only a little alike in personality

Partners resemble each other strongly in values, age and education, but only weakly in traits. In a large 2023 review the correlation between partners ranged from about .08 for extraversion to .21 for openness.

Horwitz et al., 2023

02

Similarity alone adds almost nothing

In samples of more than 23,000 people, how similar two profiles were barely predicted satisfaction once each partner’s own traits were taken into account.

Dyrenforth et al., 2010

03

How each of you handles emotions matters more

Staying steady under stress, warmth and reliability in each partner are linked to satisfaction far more consistently than any match between the two profiles.

Malouff et al., 2010; Weidmann et al., 2016

04

No test can predict a particular couple

Even studies of thousands of couples with dozens of measures explain only a modest part of how satisfied a specific pair will be. How the two people see and treat each other counts for more.

Joel et al., 2017, 2020

Why there is no compatibility percentage

Many compatibility tests end with a single number: 78 percent, a good match. We do not show one, on purpose.

A percentage suggests that the future of a couple can be read from two questionnaires. Research says otherwise: the similarity of two profiles explains very little, and no test predicts whether a particular pair will be happy.

Instead of a verdict you get a map: the traits where you are close, the ones where you differ noticeably, and what usually helps couples with that combination. A difference in character is neither a sentence nor an advantage in itself. It shows where it pays to agree on things out loud.

Privacy between the two of you

  • Your partner sees the comparison only after agreeing to it. Nothing is shared automatically.
  • The comparison opens only through its link. It is not public, and search engines do not index it.
  • Neither of you sees the other person’s answers to individual questions, only the scores.
  • Either of you can leave the pair at any moment. The comparison then closes for both, and the data of the pair is erased.

What the comparison will not tell you

  • Whether you will stay together. No test can know that.
  • A compatibility score or any verdict about the pair.
  • Who is right in your arguments.
  • How the other person answered individual questions.

Questions and answers

Do opposites attract, or do similar personalities work better together?
Neither, as a rule. Partners are on average only slightly more alike than two random people, and similarity itself adds little to satisfaction. What matters more is how each person copes with stress and treats the other. Differences are still worth knowing: they show where you will need clear agreements.
How do you know if you are compatible with your partner?
No questionnaire can tell you that. A comparison shows where your temperaments meet and where they pull apart, which helps you talk about everyday friction before it turns into an argument. How satisfied a couple is depends much more on how the two people see and treat each other than on how well two profiles match.
Is there a scientific relationship compatibility test?
There is no test that scientifically predicts compatibility. There are scientific personality tests, and the Big Five model (neuroticism, extraversion, openness, agreeableness and conscientiousness) is the most studied of them. IPIP-NEO is a public domain inventory of the Big Five with published norms. Comparing two Big Five profiles is a scientific description of two people, not a forecast for the couple.
Can we take the test separately, at different times or at a distance?
Yes, that is exactly how it works. Each of you takes the test alone, on your own device. Your partner opens the link whenever it is convenient, and the invitation stays valid for 30 days. You do not need to be together or online at the same time.
What will my partner see?
Your five traits and thirty facets next to their own, and the texts about your combination. Not your answers to individual questions and not your full report. Either of you can leave the pair at any time, and the comparison then closes for both.
Can we compare the short and the full version?
Yes. Both versions measure the same five traits and thirty facets, so a 120 result and a 300 result can be compared. The short version is a little less precise, which is why the comparison marks only differences larger than the measurement error of both tests.
Does neuroticism affect relationships?
On average, yes. Higher neuroticism in either partner goes with somewhat lower satisfaction, largely through how people interpret each other’s actions. It is an average, not a fate, and couples can work on it. The comparison shows where each of you stands and what tends to help a pair with your combination.
Why are we compared on one scale and not by the norms for our sex?
Your personal result uses the norms for your sex and age. For a couple we use one common scale, so the same answers give the same number for both of you. Average differences between men and women are small compared with the differences within each sex, and one scale avoids gaps that do not exist in behavior.
Can I give my partner the full report as a gift?
Yes. On the comparison page you can pay for your partner’s full report. It belongs to your partner and opens right away, and once both of you have the full report, the full comparison of eight sections opens as well.

Read more

Start with your own result

Take the test, then invite your partner from your result page. The comparison is free.

Short test, about 15 minutesFull test, about 40 minutes