Table 3.

Test-retest reliability of 11 select items across data collection contexts with same caregiver reporter (n = 962)

	Mean score		Difference in means	% Agreement	Kappa
	Home interview	Clinic interview	Difference in means	% Agreement	Kappa
Does the child walk several steps without the support of a person or object (e.g., wall or furniture)?	0.99	0.99	0.00	99.3%	.663
Does the child know the names of at least two body parts (e.g., arm, eye, or nose)?	0.67	0.65	0.02	80.4%	0.563
Does the child say five or more words (e.g., names like Mama or objects like cup)?	0.91	0.93	−0.02	90.4%	0.335
When asked what common objects (like a cup or a knife) are for, does the child explain correctly?	0.34	0.20	0.14	74.4%	0.363
Does the ever child kick, bite, or hit other children or adults?^a	0.45	0.31	0.14	68.0%	0.333
Does the child pick up a small object like a rock with just his/her thumb and a finger?	0.78	0.84	−0.06	78.0%	0.276
Does the child get along well with other children most of the time?	0.92	0.97	−0.05	92.2%	0.241
When the child is upset, is he/she able to calm down by him/herself?	0.45	0.59	−0.14	60.0%	0.213
Does the child pay attention when someone is talking to him/her?	0.90	0.95	−0.05	87.8%	0.156
Does the child follow simple directions (e.g., “Stand up or Come here”)?	0.98	0.99	−0.01	97.7%	0.144
Is the child sometimes impatient or unwilling to wait or hold still when you ask him/her to?^a	0.38	0.48	−0.10	49.4%	−0.020
Average	0.71	0.72	−0.01	79.8%	0.297

CREDI mean scores represent proportion of correct responses on the item

^aIndicates item that was reverse coded