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. 2022 Oct 7;17(10):e0274480. doi: 10.1371/journal.pone.0274480

Table 8. Means, standard deviations, and minimum and maximum values of the readability scores for the 250 English texts and their correlations (r) to the comprehensibility rating.

  M SD Min Max R
Flesch Reading Ease 81.07 8.18 50.38 98.13 -.13*
Flesch Kincaid Grade Level 5.47 1.99 1.00 15.42 .17*
Automated Readability Index 4.77 2.42 -0.26 16.71 .17*
New Dale Chall Readability Formula 6.16 0.87 1.20 8.48 -.01
CAREC 0.10 0.06 -0.16 0.23 -.10
CARES 0.46 0.10 0.23 0.75 -.20*
CML2RI 24.96 5.37 11.63 38.22 -.21*

Note. * p < .05.