. Author manuscript; available in PMC: 2014 Jan 1.

Published in final edited form as: Acad Pediatr. 2012 Oct 23;13(1):72–80. doi: 10.1016/j.acap.2012.08.003

Table 3.

Cronbach’s Alpha and Concurrent Pearson Correlations

BPSC Subscale	Original Sample			Replication Sample
		Pearson Correlation			Pearson Correlation
							PSI
	Cronbach’s Alpha	ASQ:SE	PHQ-2	Cronbach’s Alpha	ASQ:SE	PHQ-2	Parental Distress	Dysfunctional Interaction	Difficult Child
Irritability	.75	0.51^**	0.38^**	.64	0.24^**	0.02	0.22^**	0.13	0.42^**
Inflexibility	.83	0.09	0.03	.80	0.02	0.15	0.17^*	0.10	0.18*
Difficulty with routines	.78	0.42^**	0.25^**	.74	0.31^**	0.04	0.20^*	0.07	0.32^**
Scale alpha	−	0.70	0.80	−	0.61	0.89	0.85	0.86	0.85

BPSC = Baby Pediatric Symptom Checklist; ASQ:SE = Ages & Stages Questionnaire: Social-Emotional; PHQ-2 = 2 item Patient Health Questionnaire; PSI = Parenting Stress Index; Scale alpha = Cronbach’s alpha for each criterion instrument.

Note: P < .05

^**

P < .01.