Long story short my daughter's development is a bit behind. She's 15 months old and doesn't respond to her name (at all) she doesn't turn to voices, she's just in her own world, I know she can hear because her face lights up whenever she hears her favourite song, or mrs rachel. She has no words other than dadadada witch I don't believe she's knows what dada actually means, the past few days she's finally started taking steps! So that's great but now she's getting closer to 1 1/2 I'm worried about her lack of communication.