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. 2014 Aug 5;9(8):e103469. doi: 10.1371/journal.pone.0103469

Table 1. Frequencies of each response choice across all studies.

SINS scale point Study 1 Study 2 Study 3 Time 1 Study 3 Time 2 Study 4 Study 5 Study 6 Study 7 Study 8 Study 9 Time 1 Study 9 Time 2 Study 10 Study 11
Pop. CS GA CS CS CS CS GA CS CS GA GA GA GA
N 110 122 141 141 97 107 272 401 133 822 335 206 200
1 8.2% 37.7% 5.7% 9.9% 10.3% 3.4% 32.0% 15.8% 17.9% 47.2% 47.5% 36.0% 50.0%
2 11.8% 14.8% 17.1% 12.1% 21.6% 11.2% 11.4% 31.6% 28.4% 21.5% 20.4% 20.2% 32.5%
3 20.9% 8.2% 18.6% 20.6% 28.9% 21.6% 12.5% 13.2% 17.2% 10.2% 11.4% 13.3% 9.5%
4 14.5% 9.0% 12.9% 14.2% 13.4% 25.9% 5.9% 13.2% 15.7% 9.9% 7.9% 13.3% 7.0%
5 5.5% 7.4% 8.6% 2.8% 12.4% 19.0% 3.3% 21.1% 14.2% 5.6% 6.1% 12.8% 1.0%
6 11.8% 6.6% 6.4% 7.8% 6.2% 7.8% 8.8% 2.6% 5.2% 2.2% 2.9% 2.5%
7 10.9% 4.9% 11.4% 14.2% 2.1% 9.5% 10.3% 2.6% 1.5% 3.4% 3.8% 2.0%
8 10.9% 4.9% 12.1% 16.3% 4.1% 1.7% 7.7%
9 3.6% 4.1% 6.4% 0.7% 1.0% 0.0% 3.3%
10 0.9% 0.8% 0.0% 0.7% 0.0% 0.0% 1.5%
11 0.9% 1.6% 0.7% 0.7% 0.0% 0.0% 3.3%
Mean 4.66 3.41 4.71 4.64 3.49 4.16 4.00 3.11 3.01 2.25 2.29 2.62 1.77
SD 2.44 2.73 2.49 2.49 1.83 1.61 3.00 1.62 1.57 1.62 1.67 1.64 0.96
Skewness .36 .98 .35 .24 .92 .30 .65 .46 .49 1.33 1.32 .71 1.25
Kurtosis −.86 −.10 −1.09 −1.16 .55 −.38 −.81 −.78 −.70 .96 .84 −.54 .96

Note: Pop. =  population; N = number of participants; CS =  undergraduates; GA =  general adult.

1

Sample sizes across all but one study were determined so that we had 95% power to detect significant effect sizes of r = .20. However for Study 7 we were unable to recruit more participants, meaning that the critical value for significant correlations was higher (r = .31) in this study.