No big smiles or other warm joyful expressions

No back and forth sharing of sounds, smiles, or other facial expression

No babbling, no pointing, no gestures such as reaching or waving. No response to own name being called, does not point to familiar objects or people on request,​ does not follow simple commands

No single words, uses less than 10 words consistently, does not use words to communicate wants such as "more" and "down", does not make animal sounds, not yet starting to combining words (ex: "more cookie")

No spontaneous 2-word phrases, speech is not understandable, does not follow simple directions (e.g., "roll the ball"), does not point to named body parts or pictures ​​

Says only 1-2 word spontaneous phrases, cannot answer "what" and "who" questions, does not initiate conversation, only speaks when spoken to or repeats what others say word for word

Talks only about the "here and now", not events in the past or future, puts words together in the wrong, order and/or leaves out words such as in, on, of, the, a, etc. Drops word-endings (ex: -ing, plural -s, etc.), cannot listen to 2-3 lines of a story and answer simple questions about it.

Does not engage in reciprocal conversation or make comments relevant to the topic or situation cannot answer "how" and "why" questions