I have a brother who pretty much lacks the emotional soul and it didn’t happen from any trauma. He was born that way. His rational side is just too powerful to allow the emotional side to grow. When we were in grade school, the superintendent of schools and a delegation from the board came to our house to tell my parents that my brother had scored higher on the IQ test than anyone that they had ever had in the school district.
He was the meanest kid you could you imagine, made my life miserable when we were little.
His meanness is understandable as it is quite common for the emotional tension to build into much frustration and when the limit blows, it gets nasty and out of control. Often these children need time alone in their rooms after school for emotional release. They will thrash their arms and often cry for about half an hour and then they are ok.
Music helps soothe the tension as long as it is not anger rap beat which will make it worse.
It has to do with the way they sort and hold emotional input while processing logical input.
High logical intelligence is usually present as their logical consciousness stores and retrieves memories in a matrix directory pattern rather than emotional bridging. This is why they can tell you the page number and where the answer is at on the page when you ask them a question.
I learned these things not from reading, but I can read peoples memories and feel how their consciousness functions just by being around a person. I use the ability to help learning disabled.