Table 1.

Descriptive Statistics and Variance-Covariance Matrix of Indicators of Parental Negativity from 9 to 18 months

	Indicators of Parental Negativity
	Hassles 9m	Hassles 18m	Hassles 27m	Efficacy 9m	Efficacy 18m	Efficacy 27m	Overreactivity 9m	Overreactivity 18m	Overreactivity 27m
	Descriptives
Means	18.52	19.08	19.66	10.05	10.43	10.44	1.99	2.46	2.92
SDs	5.53	5.18	5.25	1.36	1.32	1.37	1.38	1.34	1.30
N	505	520	491	531	515	488	527	513	488
	Covariance/Correlational Matrix1
Hassles 9m	30.55	0.66	0.60	0.36	0.33	0.23	0.38	0.35	0.28
Hassles 18m	18.79	26.87	0.67	0.24	0.25	0.19	0.31	0.35	0.26
Hassles 27m	17.54	18.18	27.59	0.18	0.29	0.32	0.26	0.38	0.39
Efficacy 9m	2.74	1.71	1.28	1.86	0.63	0.55	0.32	0.23	0.20
Efficacy 18m	2.41	1.71	1.99	1.14	1.75	0.69	0.27	0.34	0.34
Efficacy 27m	1.76	1.36	2.30	1.03	1.25	1.86	0.19	0.30	0.38
Over-reactivity 9m	2.93	2.21	1.91	0.59	0.50	0.36	1.90	0.59	0.54
Over-reactivity 18m	2.61	2.46	2.66	0.43	0.60	0.54	1.09	1.79	0.71
Over-reactivity 27m	2.02	1.75	2.70	0.35	0.59	0.67	0.96	1.24	1.70

¹Note: Correlations are presented in the upper triangle of the correlation/covariance matrix, covariances in the lower triangle. Variances appear along the diagonal.