Table 2.

Mean social behavior summary scores at the beginning, middle, and end of the behavioral coding weeks and across all behavioral coding weeks

Variable	Coding Week 1	Coding Week 10	Coding Week 19	All Coding Weeks
Vocalizations
Initiating	0.29 (0.29)	0.16 (0.12)	0.13 (0.09)	0.17 (0.16)
Responding	0.47 (0.34)	0.82 (0.45)	0.81 (0.45)	0.86 (0.48)
Other	0.10 (0.18)	0.14 (0.16)	0.06 (0.08)	0.11 (0.13)
Interactions
Peer	0.43 (0.36)	0.67 (0.23)	0.35 (0.32)	0.48 (0.35)
Leader	0.09 (0.16)	0.06 (0.05)	0.05 (0.07)	0.06 (0.10)
Group of Peers	0.29 (0.38)	0.23 (0.28)	0.48 (0.42)	0.29 (0.35)
Group of Peer(s) and Leader(s)	0.06 (0.10)	0.02 (0.03)	0.07 (0.16)	0.06 (0.15)
Self	0.27 (0.29)	0.24 (0.17)	0.20 (0.18)	0.25 (0.25)

Note. Standard deviations are in brackets. Vocalization scores indicate average number of vocalizations per 20-second coding block for a given intervention session across participants. Interaction scores indicate average proportion of time spent in an interaction for a given intervention session across participants.