Used to be called shyness.
Not exactly. Not shyness.
I have a relative who would not interact with other children, would just cross his arms and shake his head as he watched other children play. Few friends growing up. But he’s a genius at math and astronomy. Has a Ph.D. to show for it.
Now his niece, who he only met once when she was an infant, has been diagnoses with Autism, previously call Asperger’s in some presentations (the case with both).
She has trouble socially and is extremely gifted at what? Guess? Math and astronomy.
There are so many similarities between the two of them it’s a bit spooky. Remember, they only met once.