Psychologists' main problem with the MBTI is the science behind it, or lack thereof. In 1991, a National Academy of Sciences committee reviewed data from MBTI research and noted "the troublesome discrepancy between research results (a lack of proven worth) and popularity."
The MBTI was born of ideas proposed before psychology was an empirical science; those ideas were not tested before the tool became a commercial product. But modern psychologists demand that a personality test pass certain criteria to be trusted. "In social science, we use four standards: Are the categories reliable, valid, independent and comprehensive?" Adam Grant, University of Pennsylvania professor of psychology, wrote on LinkedIn. "For the MBTI, the evidence says not very, no, no, and not really."
Some research suggests the MBTI is unreliable because the same person can get different results when retaking the test. Other studies have questioned the validity of the MBTI, which is the ability of the test to accurately link the "types" to outcomes in the real world — for example, how well people classified as a certain type will perform in a given job. [Why Do People Ghost?]
https://www.livescience.com/65513-does-myers-briggs-personality-test-work.html
The MBTI was born of ideas proposed before psychology was an empirical science; those ideas were not tested before the tool became a commercial product. But modern psychologists demand that a personality test pass certain criteria to be trusted. "In social science, we use four standards: Are the categories reliable, valid, independent and comprehensive?" Adam Grant, University of Pennsylvania professor of psychology, wrote on LinkedIn. "For the MBTI, the evidence says not very, no, no, and not really."
Some research suggests the MBTI is unreliable because the same person can get different results when retaking the test. Other studies have questioned the validity of the MBTI, which is the ability of the test to accurately link the "types" to outcomes in the real world — for example, how well people classified as a certain type will perform in a given job. [Why Do People Ghost?]
https://www.livescience.com/65513-does-myers-briggs-personality-test-work.html