She'll say "mama" "dada" and "cat" on OCCASION, and especially with "cat" I know that she means the cat (instead of just babble), but then she'll go weeks without saying it and won't say it when prompted. She does babble a lot, very often, but just meaningless syllable not affected by any words or sounds you make at her. She will wave, but not when you say "wave" or wave at her. She will clap, but not often and not when you clap. It just says in all the books that babies love to mimic sounds and actions, and she just doesn't.
She will grin when you smile at her, but I think that isn't intentionally mimicking, I think it's just that people smiling at her make her happy. The smiling plus she has no problem with eye contact (unless she's angry and/or you tell her no), and she has had intense separation anxiety which makes it seem like it's not something like autism.
Oh, she's 10 months old, although she was born a month early. She hasn't had any real developmental problems that I've seen, on some she's behind and on some she's ahead but there is a good progression with everything and no cause for worry. It's just this weird thing.
Or is it? What do ya'll's babies do?