Table 1.

Ten behaviours assessed in the videos.

Serial no	Variables	Yes	No
1	Response to name: When child is involved with a toy; call him or her by name
2	Hearing: If no response to name, play favourite song or rhyme or toy
3	Eye contact: check during play when needs help, response to name, sharing the play or tasks, during rhyme time
4	Age-appropriate gestures: check during play, need, rhyme time, picture book
5	Age-appropriate word use: check during doll play, for need, rhyme time, hide and seek or ball play time
6	Unusual speech: echolalia, self-talk, prosody, jargon, neologisms, scripted speech
7	Body to communicate: check when need arises, help during tasks, rhyme time, picture book task
8	Age-appropriate play: check with doll play- functional, imitation, imaginational representational, multi scheme play. Compare with puzzle play as well
9	Behaviour for need: check for tantrums for need instead of gesture, word or eye contact.
10	Sensory concerns: flicking items, lining, throwing, mouthing, rocking, hand flapping