Does your LOs interact? My LO doesn't really respond to his name, only sometimes and doesn't really interact with other children (unless it is a game of chase) or adults.
What do you mean by "interact"? Mine doesn't really "play" with children, but I think at this age they pretty much are known to just parallel play, where they play near each other and not necessarily with each other. Mine interacts with other children only if they have something she wants. Then she will try and take it. She interacts with adults, but is very slow to warm up to anyone. If it is someone she knows well she likes to play, but if it is a stranger she will stick to me like glue for a bit and then slowly get comfortable. She may play a little with them if they get on the floor or make the effort, but if they are just sitting there talking to me she makes no effort to play with them. If it is someone she knows well, like my mom, then she won't leave her alone and wants to play- even if my mom is just sitting there trying to have a conversation with me. So it really depends on if she knows them or not. Mine responds to her name most of the time, but there are definitely times she ignores me, and many times she ignores only me but not dh or my mom. Are you worried about your lo's hearing at all? I've heard that many times it could be a hearing issue. I know that with mine it is not hearing as she will mostly respond, and when she ignores me it truly feels like she is ignoring me and not deaf. A couple times I even caught her giving me the quick glance with her eyes- so I know she heard me and just is not interested in what I have to say. It's usually when she is busy doing something fun and probably doesn't want me to take her away. Sometimes she even starts to run away- like she realizes I am going to make her do something she doesn't want to. She hasn't quite learned yet that I can run a lot faster!