education science major here according to information processing theory being able to make meaningful connections with new information increases the chance of being able to retrieve the new information from long-term memory at a later time i’m not sure if there’s any particular link with adhd but this is something everyone experiences i think adhd has more to do with working memory and the sensory register and in most cases doesn’t have a huge affect on retrieval from long-term memory   either way great insight this is helpful info that everyone should be aware of