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. Author manuscript; available in PMC: 2015 Dec 30.
Published in final edited form as: J Res Educ Eff. 2014 Oct 9;8(3):366–379. doi: 10.1080/19345747.2014.952464

Table 6.

Annual reading gain in effect size based on longitudinal SEELS data

10th Percentile
25th Percentile
50th Percentile
Grade Effect
Size
L95%
CI
U95%
CI
Effect
Size
L95%
CI
U95%
CI
Effect
Size
L95%
CI
U95%
CI
2–3 0.78 −1.74 3.30 0.63 −1.43 2.68 0.48 −1.37 2.32
3–4 0.66 −1.41 2.73 0.54 −1.31 2.39 0.42 −1.21 2.04
4–5 0.51 −1.85 2.86 0.41 −1.40 2.22 0.36 −1.28 2.00
5–6 0.39 −1.60 2.37 0.31 −1.26 1.88 0.27 −1.2 1.75
6–7 0.44 −1.31 2.19 0.37 −1.11 1.85 0.23 −1.1 1.57
7–8 0.48 −1.44 2.39 0.42 −1.19 2.03 0.26 −1.15 1.66
8–9 0.46 −2.18 3.09 0.35 −1.69 2.39 0.26 −1.62 2.13

Note. L95% CI = lower 95% confidence interval; U95%CI = upper 95% confidence interval.