Is the MBTI tool valid and reliable?

Yes.

Research conducted on the MBTI tool has shown that the results it provides are reliable and valid.

The MBTI tool’s reliability statistics are excellent, and its validity has been firmly established in hundreds of separate studies.

Reliability refers to whether the results are consistent:

Do people tend to reply to the items in the same way when they take the test later, and do they tend to get the same type?

Can you count on the results?

Validity refers to the instrument’s ability to measure psychological type and apply Jung’s theory.

Technical information on the research and psychometric properties underlying the instrument are published in the MBTI^® Manual and in other scientific publications.