Critics argue the Myers-Briggs Personality Test doesn’t stand up to scientific scrutiny:

The obvious criticism of this test is that it’s based on dichotomies. Are you perceiving or judging? Introverted or extroverted? You must choose. This reeks of pseudo-science. Of course, most of us don’t fall clearly on one side or the other. When the specific introvert vs. extrovert duality was a hot topic a few years ago, many writers persuasively argued against reducing socialization patterns to a simplistic either/or. Indeed, reams of psychological literature debunks MBTI as wildly inconsistent—many people will test differently within weeks—and over reliant on polarities. For instance, someone can certainly be both deeply thinking and feeling, and we all know folks who appear to be neither. “In social science, we use four standards: are the categories reliable, valid, independent, and comprehensive? For the MBTI, the evidence says not very, no, no, and not really,” organizational psychologist Adam Grant wrote in Psychology Today after reviewing all the science on MBTI. It’s pretty damning.

But the same journalist admits she still finds the test useful:

Any means for busy adults to take time to comprehend ourselves and see how our styles converge and diverge from others has a use—and more honestly, it’s fascinating. So while I remain skeptical of MBTI’s accuracy and I don’t think the test should be given to children and then treated like a blueprint for their future life, I’m optimistic about its potential to make us feel less alone and less hamstrung by our imperfections. A smart aleck might observe drily that this idealistic conclusion was foreordained: “how typically ENFP of you.” Guilty as charged.

So perhaps the Myers-Briggs is only helpful in that it gives people an excuse to engage in self-reflection. Is self-reflection only possible today (and not viewed as indulgent or unnecessary) when given a pseudo-scientific veneer?

Organizational psychologist Adam Grant gives two reasons Myers-Briggs has been so popular:

Murphy Paul argues that people cling to the test for two major reasons. One is that thousands of people have invested time and money in becoming MBTI-certified trainers and coaches. As I wrote over the summer, it’s awfully hard to let go of our big commitments. The other is the “aha” moment that people experience when the test gives them insight about others—and especially themselves. “Those who love type,” Murphy Paul writes, “have been seduced by an image of their own ideal self.” Once that occurs, personality psychologist Brian Little says, raising doubts about “reliability and validity is like commenting on the tastiness of communion wine. Or how good a yarmulke is at protecting your head.”

Perhaps this “ideal self” concept could be analogous to Max Weber’s ideal types. Social scientists do a lot of categorizing as they empirically observe the social world but it can be difficult (Weber suggests pretty much impossible) to exhaustively describe and explain social phenomena. Ideal types can provide analytical anchors that may not be often found in reality but provide a starting point. Plus, using ideal types of personality might help give individuals something to aspire to.