There are many possible causes why people have problems to track relevant information in a conversation.
Possible causes could be:
- hearing problems / tinnitus / hyperacusis
- lack of concentration due to sleep problems
- chronic worrying about problems (e.g. work related problems)
- depressive symptoms
- low interest in the topic of conversation
If you have a history of attention problems, distractibility and / or hyperactive symptoms (or children with these problems) you should also consider a residual form of ADHD (Attention Deficit Hyperactivity Disorder).