[analog31]

Here's a way to eliminate the subjectivity: When a person takes a particular test, you print out their report along with 9 other reports chosen at random, each with a code number but no name. Then you try to pick the one that most closely resembles you or the subject. The percentage of people who can pick their own report is referred to as the "accuracy" of the test. Also, you do this after securing robust legal protections for privacy.

By way of analogy, I'm thinking of a study where people try to pick a picture of themselves out of a collection of pictures.

[boomboomsubban]

Being able to tell which report is made from your answers doesn't tell you anything meaningful. It's like saying "describe yourself in ten words. OK now which short description describes you?"

[analog31]

That's fair, but does it tell anybody anything meaningful? How do we know that the reports are accurate?

I've seen some of the reports, and they're fairly elaborate, like multiple pages.