Not imagining it, it's been documented.
ISTJ - Introverted Sensing Thinking Judging - Ransdell Associates
Yes, I've actually read something that essentially said the bolded. The theory was that many AAs type themselves with expectations of dominant class preferences in mind. I'm willing to bet that the same often happens to many men and women on the T vs. F scale.
Haha, so true. At the same time though, I can't imagine where we'd be without the slaves who were idealist. I'm led to think about the hope that so many slaves used as fuel for survival, and I can't think of any other way to define that hope but in terms of idealism. In the face of what was in front of the last of them(generations of enslavement), many managed to envision freedom and a new day, to the degree to which it was within their mind's grasp as a potential reality. There were few cohesive plans for survival, and little idea of where anyone would be housed, or how they would legitimately make a living; yet ultimately, they lived and died to hopefully see that day, bring what may.
I figured this using the old temperament system, where it seems most of my family and people on the job are what is known as Melancholy. And then, ISTJ seems to fit (matching the correlation I made between the two systems), because most of them are so orderly, externally logical, and have these sharp memories (can remember everything I ever did wrong). Yet I hear of other people here alnd elsewhere talking about a wide variety of types in their family, work, etc. and I often wonder if it is realistic for me to be so surrounded by this one type. But apprently, it is true.
I tend to go along with type/temperament being inborn, but of couse, that is not absolutely certain. If it is developed from the environment, then it would make sense that AA's would be ISTJ, because that perhaps is the best type for survival in slavery, and the rest of discrimination after that.
You can see the corresponding "Melancholy" profile here:
The Melancholy Temperament ("Inclusion" is the IST part of it, and "Control" is the SJ).
Notice, the main thread of this temperament is "independence".
The I's would have less problems from the slavemaster, while the E's probably get more in trouble. Especially "Choleric" types like ENTJ. They were deliberately dumbed down, and the main focus was survival, so there would be a leaning towards S over N with its imagination. They also became very traditional, with their pain and survival expressed through arts associated with memories (books, plays, etc we have seen over the decades).
T would be extraverted (J), because again, you're only doing what you have to to survive. So they learned to be tough, and directive, though again, not very initiating or pragmatic about it. So they turn it on themselves, their families, etc. F would then be introverted, and tertiary, as they had to draw their self-worth and strength from "within" often through stuff like religion.