Spanish validation of the self-evaluation of negative symptoms scale SNS in an adolescent population

BMC Psychiatry

Table 1 Descriptive statistics of the items on the SNS scale

Items	Mean	SD	skewness	kurtosis	Percentage of affirmative responses^a
1	.53	.63	.81	−.39	44.9
2	.31	.55	1.62	1.71	26.3
3	.17	.45	2.78	7.07	13.3
4	.31	.58	1.68	1.77	25.4
5	.51	.68	.99	−.25	40
6	.55	.68	.85	−.47	40
7	.56	.75	.92	−.62	40.3
8	.91	.76	.15	−1.27	66
9	.70	.74	.55	−1.01	52.9
10	.35	.63	1.56	1.18	27.1
11	.41	.67	1.36	.50	30.8
12	.59	.74	.83	−.71	43.7
13	.79	.71	.33	−1.01	61.9
14	.72	.70	.72	−.88	57.9
15	1.07	.77	1.07	−1.32	73.3
16	.62	.74	.62	−.84	45.9
17	.25	.53	.25	3.20	20.5
18	.27	.54	.27	2.64	22.2
19	.38	.61	1.37	.78	31.1
20	.61	.74	.77	−.81	45.4
Total	10.57	6.27	.73	.41	–

ISSN: 1471-244X