We were all subjected to a test like this recently here. I'm talking most people have been here 5+ years. And suddenly my boss needs a test like this to figure out that I am introverted, that Bob likes to take charge, and so on??!!?!? Really? Fire that manager, if they are that incompetent. I refused to take the test, and fortunately my boss felt the same way and backed me 100%.
It's outrageous. You've observed my capabilities, you know I am great (or poor, or whatever), and suddenly I have to take a test where I am supposed to tell you if I am lonely, if I make friends, and so on. No. No. No.
an old person contests a no-hire decision with "I wasn't hired because I was old"
option A: Hiring manager says "well I just thought you were a jerk"
option B: An objective and universally applied test scores the applicant as being 95% jerk, which is above the 60% cutoff that the company uses globally
which would you rather defend yourself with?
Once the company asserts this defense, the plaintiffs ask for demographic details on every employee in the company, and what the scores were at time of hiring.
They have no place at a serious company hiring for a technical position, though. Usually 10 or so minutes of face-to-face talking is more than enough to tell you if your candidate is mentally ill, on drugs, or a major asshole.