Every non-antique car has an odometer. Some states require yearly car inspections. Odometer readings are normally required when selling a car.

I've got a PhD in psychology. I have things. I. could. say. about this topic. But I would like to emphasize, in the strongest of terms, that Cronbach's alpha is not a measurement of test-retest reliability. Cronbach's alpha is a measure to answer the question, "If we ask five questions to measure the same thing, how well do they agree?" Test-retest reliability says, "If we ask these same questions X days/months/years later, how likely is it we'll get the same answer?"

Past research on this latter form of reliability (test-retest) on the MBTI have found it to be quite weak; yes, I'm sure it's probably more favourable if you don't binarize the measures. But it's still weak. If you're interested, the references on the "Reliability" section of the Wiki page[1] is a decent place to start.

My biggest issue with the MBTI, however, is that it gets used to make important decisions like whether to hire someone, despite little to no evidence for its validity in terms of predicting on-the-job performance. And that's extremely concerning. Quite frankly, personality tests have very little place in hiring assessments at all -- often the primary dimension employers care about is conscientiousness, and those questions are generally too transparent to be reliable for someone who has a vested interest in getting a job. Are you really going to report that you are "someone who tends to be disorganized" when you're trying to get hired?

If you're an employer looking for ways to find the best candidates, then you have a responsibility to ensure that the methods you're using to test someone's fit are a reliable indicator of their actual fit. Interpret "fit" how you like, but generally speaking, you want measures that are going to actually tell you how well that person will do with the tasks they would be performing. You're going to have much better luck with a take-home assignment or temporary contract than you will reading the tea leaves of MBTI, or even using an established, valid test like the Big Five Inventory. These measures just aren't meant for what you're trying to use them for.

[1] https://en.wikipedia.org/wiki/Myers%E2%80%93Briggs_Type_Indi...

It was changed the other way. I originally posted with your suggested link, but then moments later it was a "404 Not Found" error page. Your web site might be unreliable. Also, until I found the other link, I was unaware that there were any images. I had seen only plain text. Currently there are images, but will they stay? Do you know what went wrong with the web site? Might it go back to being "404 Not Found" again?

If you are certain that your web site isn't going to go "404 Not Found" again, contact dang.