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Table 1 Descriptive statistics of the items on the SNS scale

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

Items Mean SD skewness kurtosis Percentage of affirmative responsesa
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
  1. aPercentage of participants that marked response options 1 and 2