Note. Data points represent effect sizes for the following ages:
8–11 (d = 0.02), 12 (d
= 0.14), 13 (d = 0.26), 14 (d
= 0.38), 15 (d = 0.38), 16 (d
= 0.47), 17 (d = 0.36), 18 (d
= 0.33), 19 (d = 0.28), 20–29
(d = 0.30), 30–39 (d
= 0.23), 40–49 (d = 0.21),
50–59 (d = 0.19), 60–69
(d = 0.25), 70–79 (d
= 0.23), and 80+ (d = 0.21).