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. 2019 Oct 25;10:2421. doi: 10.3389/fpsyg.2019.02421

Table 2.

Summary statistics for Bamford-Kowal-Bench SNR-50 scores at each grade level.

Grade N Mean SD Min Max
First 118 3.64 3.64 −2.5 18.5
Second 220 2.45 3.56 −7.0 14.5
Third 149 1.87 3.29 −5.5 11.5
Fourth 194 1.36 2.97 −7.0 13.0

SNR, signal-to-noise ratio.