| Paired Samples Test | ||||||||||
| Grouping | Age | Group | Paired Differences | t | df | Sig. (2-tailed) | ||||
| Mean | Std. Deviation | Std. Error Mean | 95% Confidence Interval of the Difference | |||||||
| Lower | Upper | |||||||||
| Experimental | 10 - 11 (preteen) | EL - BL | −19.63 | 13.33 | 2.16 | −24.01 | −15.25 | −9.07 | 37 | 0.000 |
| 12 - 13 (early teen) | EL - BL | −16.11 | 10.31 | 1.67 | −19.49 | −12.72 | −9.63 | 37 | 0.000 | |
| 14 - 15 (mid-teen) | EL - BL | −14.97 | 10.04 | 1.80 | −18.65 | −11.28 | −8.29 | 30 | 0.000 | |
| Control | 10 - 11 (preteen) | EL - BL | −6.09 | 9.634 | 1.65 | −9.45 | −2.73 | −3.69 | 33 | 0.001 |
| 12 - 13 (early teen) | EL - BL | 2.03 | 11.47 | 1.91 | −1.85 | 5.91 | 1.061 | 35 | 0.296 | |
| 14-15 (mid-teen) | EL - BL | 0.00 | 9.33 | 1.91 | −3.94 | 3.94 | 0.000 | 23 | 1.000 | |