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. 2014 Oct 20;9(10):e110494. doi: 10.1371/journal.pone.0110494

Figure 1. Correlation (A) and Bland-Altman plot (B) for the BI and Self-perceived Difficulty Scale.

Figure 1

Bland-Altman method for plotting the scores of the difference between the BI and Self-perceived Difficulty Scale. The 2 dashed lines define the limits of agreement (mean of difference ±1.96 SD).