thats interesting, my SO has called the same thing "selective hearing" for over a decade, and we only found out this past spring that he and our son are autistic. they both do it.
we were talking about this a couple weeks ago, and as my SO describes it, its as if the sounds come in, he hears them perfectly, remembers them, but doesnt recognize them as requiring a response. if i can get his attention, he will often then answer me. this happens primarily when he is absorbed in something like a tv show, reading, or video game. its like he delays processing them when hes busy until his attention is directed to me.
i cant be sure, but the delayed processing may be something hes adapted to over time. our son doesnt have the delayed processing response, you have to ask the question after getting his direct attention or he cant answer you. maybe thats because hes only 4, or maybe he just doesnt process without visual attention, im not sure. it will be interesting to see over time if he is able to do the delayed processing his father does.
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Neurotypically confused.
partner to: D - 40 yrs med dx classic autism
mother to 3 sons:
K - 6 yrs med/school dx classic autism
C - 8 yrs NT
N - 15 yrs school dx AS