Dear Coursehero team,

I am looking at this document: DOI: 10.3850/S2345734115000186

Can you please help me understand what is meant by these results:

There was a significant improvement in Overall Literacy Ability from pre-test (M = 26.44, SD = 16.90) to post-test (M = 51.16, SD = 19.77), t(55) = 12.791, p < .001, Cohen's d = 1.34. In addition, there were significant improvements in all five areas (see Figure 1)

Alphabet Knowledge: pre-test (M = 56.04, SD = 31.34) to post-test (M = 80.43, SD = 21.35), t(55) = 7.519, p < .001, Cohen's d = 0.91;

Reading Ability: pre-test (M = 4.38, SD = 11.60) to post-test (M = 30.27, SD = 31.28), t(55) = 6.714, p < .001, Cohen's d = 1.10;

There was a significant positive correlation between Hours of Intervention and Overall Literacy Ability Gain, r(54) = .347, p = .009. (see Figure 2).

Thank you.