The sixteen types

The four letters you got on another site can be used here as they are. There is just a small rule about how they are read, so it is written down here. A fine point, but one that bears directly on the result.

The four letters are used as a shared vocabulary

ENTP, INFJ, ISFP. These four letters have become the common language of talking about personality. Friends understand them, they work on social media. As an entrance there is nothing more convenient.

What this site deals with is sixteen types and the sixteen relations decided by their combination. The types themselves have their own symbols, but they are hard for a newcomer to read, so the four-letter form is shown by default. The switch in the header changes to the symbol display at any time.

Here, J and P are not switched

When bringing the four letters into this system, there is a school that switches the final J/P for introverts only: reading ISFJ as ISFP.

That is consistent when the four letters are read by way of the ordering of cognitive functions. But the web-based 16-type tests do not use the function ordering. J/P measures directly the behavioural tendency: decide first and act, or decide on the spot.

And this system, too, has an axis that looks at the same thing. It is called rational/irrational, and it likewise points to deciding first or responding on the spot.

Since the same thing is measured directly, there is no reason to insert a conversion in between. So the four letters are read as they are.

The ISFP feel of "arranging the comfort of the moment", the ISFJ feel of "protecting what is to be protected". The texture of each overlaps naturally with the content of the types here.

Introverts are more likely to get split results

Web tests sometimes score by personality tendency while the type descriptions rest on a different theory. Then it happens that the score says A, but the description you found convincing was B.

This happens more often for introverts and is hardly a problem for extraverts. So only when an introverted four-letter code is entered, two confirming questions are inserted. Not to decide for you, but to show both views.

Sometimes both fit. That is interesting information in itself, so read both relations side by side.

Frequently asked

My result changes every time I take a test

It happens often. Web-based 16-type tests sway with the mood of the day and the way you answer. That is why this site does not assert "who you are", and instead tells you how the combination fits.

I do not know the other person's type

The quickest way is to try two or three likely candidates and see which feels closest. If one of the relation descriptions makes you think "this is it", that line is probably near.

The result differs from compatibility charts on other sites

Because they measure different things. Most compatibility charts give a score from the number of matching letters among four. This site returns not a score but the kind of fit. More in how this differs from other tests.

Does a type change?

In this system the type itself is treated as unchanging. But behaviour changes with age and experience, so test results move. The younger, the more they are said to sway.

MBTI® is a registered trademark of The Myers-Briggs Company. This site is not affiliated with that company or related bodies. 16Personalities is a service of NERIS Analytics Limited. This site is not affiliated with that company. This site accepts those test results as input, but the judgement and interpretation are its own.