I think mine is most obvious when it comes to math. I would get the hell beaten out of me by my parents while I was supposed to be doing homework.
I specifically remember working on memorizing my multiplication tables. My father was "helping me" and I got all the way to 6X8 and drew a blank. He got the belt out and started hitting me over and over and over screaming at me that I'd never forget what 6X8 was again.
He was right. My math skills stopped right then. I know that 6X8=48 but if asked what 7X8 is I have to mentally go 6X8 is 48 and 48 plus 8 is....48-49-50-51-53-53-54-55-56. All the times I'd practiced the multiplication tables before that incident made it where I could do basic math okay but it still to this day brings back memories of a child screaming for a parent to stop.
I made around 20 on every area of my SAT except math, which was a 7.
I went to college as a non traditional student later in life. Since I'd been out so long I had to go through evaluations to see where I needed to be placed.
I took a reading comprehension test. I finished the test, first one they'd ever have finish the entire test. Then they scored it. I was the first ever to make 100% on the reading comprehension.
Then I took the math evaluations. I flunked it big time. I think out of all of them I only answered 5 or 6. They put me in remedial math. I went in and the teacher asked me to take a test to see where they needed to place me.
It had simple math, addition, subtraction, multiplication, and division plus decimals, fractions, etc....I tested OUT of every area that was basic math.
The professor came up to me and asked me why I was assigned to his class. I told him I didn't know. So he put me in beginning algebra. OMG!!!
I had no idea how to do that. I had no background in this at all and no openings in my brain to do this. How could I do math with fractions over fractions by counting 6X8 is 48 and 48 plus 8 is....48-49-50-51-53-53-54-55-56 and so forth.
I flunked it. Then I took it at OU, flunked it. Then I took it at OSU, flunked it.
I took it one more time but before I did I went into the counselors office and asked her if she knew how to get me evaluated for a learning disability. Secretly I was praying, chanting in my head, making all kinds of deals with God if I could get out of taking any math classes if I got an evaluation and was diagnosed with a learning disability.
My secret goal was to get diagnosed so they couldn't require me to take college algebra at all and maybe get out of taking college math. So I went to be evaluated.
The Dr. told me that my math skills were so deeply ingrained and I had buried them deep in my brain. So deep that new math skills had no way of making any associations with them so I could progress my skills any more. That I could take the classes but I shouldn't have to be stressed by them.
She recommended I try beginning algebra again and this time have untimed tests which meant I got to go to a testing area and I could sit there all day if I wanted to. I could even leave and come back the next day if I wanted to. I got a special tutor that worked with students with learning issues and she helped me figure out how I learned math. We came up with some good ideas and I passed beginning algebra with a B. When I went to take intermediate algebra my tutor had moved to a different college and I didn't know what the professor was even talking about.
As far as working in the real world my math is perfect. I have no issues with it at all. But if someone wants to talk to me about going back to go for a masters or something higher I freak because I know that would mean higher math.
So to answer your question. Doing homework with my dad as a child traumatized me to such a degree that I am unable to learn new math skills as an adult.