Table 1.

Inter-coder Reliability of the Behavioral Observation Measures

DPICS Category	Percent Agreement	Kappa
Positive Following in CLP
Behavior Description	81	.50
Unlabeled Praise	85	.75
Labeled Praise	100	1.00
Reflective Statement	100	1.00
Negative Leading in CLP
Indirect Command	89	.86
Direct Command	98	.84
Descriptive/Reflective Question	94	.83
Information Question	83	.82
Criticism	86	.78
Total	90	.83

Note. DPICS = Dyadic Parent-Child Interaction Coding System; CLP = Child-Led Play. Percent agreement calculated by summing agreements across participants (and assessment points) and dividing by agreements plus disagreements across participants.