| Boys | Girls | t-value | |
| n = 276 | n = 46 | df = 320 | |
| PEI | 4.76 (2.22) | 4.52 (2.00) | 0.68 ns |
| PEC | 3.50 (2.79) | 2.76 (2.68) | 1.68 ns |
| PEO | 3.92 (2.12) | 3.83 (1.89) | 0.28 ns |
| WEI | 6.04 (2.06) | 5.26 (2.17) | 2.35 * |
| WEC | 6.08 (2.82) | 5.26 (2.85) | 1.82 ns |
| WEO | 4.61 (2.04) | 4.52 (1.76) | 0.26 ns |
| PRI | 3.58 (2.89) | 4.46 (3.20) | 1.87 ns |
| PRC | 4.63 (2.71) | 4.20 (2.86) | 0.99 ns |
| PRO | 5.00 (2.51) | 6.33 (2.44) | 3.34 *** |
| WRI | 6.17 (2.80) | 5.87 (2.93) | 0.66 ns |
| WRC | 2.43 (2.21) | 1.67 (1.87) | 2.19 * |
| WRO | 6.07 (2.46) | 7.33 (2.10) | 3.72 *** |
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