Table 3.

Test – Retest Reliability of the Early Social Communication Scale (ESCS) Variables

Variables	9 – 12 months	12 – 15 months	15 – 18 months
RJA	.21*	.39***	.25*
IJA	.26*	.30**	.48***
IBR	.39***	.07	.14
RBR	.12	.03	.09
IJA – PS	.06	.10	.12
IJA – EC	.26*	.32**	.46***
IBR – PG	.26*	.02	.14
IBR – ECR	.16	.07	.22*

Note. IBR = initiating behavior regulation/requests; IJA = initiating joint attention; RBR = responding to behavior requests; RJA = responding to joint attention.

^*p < .05;

^**p < .01;

^***p < .001.