if you are concerned about your child's speech and language development here is an easy checklist.
An 18 month old may need to see a speech and language pathologist if he or she is not:
-Does not use the word no
-Does not use 10 or more words
-Does not understand the use of names of familiar objects (ie: doggy, ball, bed, car)
-Does not take turns when playing with a partner
-Never answers a question with "what is this?"
-Does not us toys for pretend play
-Does not understand simple commands
-Is not pointing to pictures in books (ie: animals, toys, household objects)