Table 1. Descriptive Statistics and Correlations.
| M | SD | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 | 13 | 14 | 15 | 16 | 17 | 18 | 19 | 20 | 21 | |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1:1st grade IQ | 102.39 | 14.83 | 1.00 | ||||||||||||||||||||
| 2.In-class attentive behavior | 4.89 | 1.21 | 0.20 | 1.00 | |||||||||||||||||||
| 3:1st Grade CE | 34.11 | 9.14 | 0.37 | 0.44 | 1.00 | ||||||||||||||||||
| 4:1st Grade PM | 76.07 | 13.48 | 0.48 | 0.37 | 0.57 | 1.00 | |||||||||||||||||
| 5:1st Grade VSM | 28.71 | 6.72 | 0.27 | 0.43 | 0.54 | 0.43 | 1.00 | ||||||||||||||||
| 6:1st Grade Number RT | 33.76 | 7.10 | -0.13 | -0.41 | -0.42 | -0.23 | -0.39 | 1.00 | |||||||||||||||
| 7:1st Grade Letter RT | 31.53 | 7.00 | -0.18 | -0.43 | -0.41 | -0.32 | -0.32 | 0.76 | 1.00 | ||||||||||||||
| 8:5th Grade CE | 50.59 | 9.94 | 0.47 | 0.51 | 0.59 | 0.50 | 0.42 | -0.39 | -0.43 | 1.00 | |||||||||||||
| 9:5th Grade PM | 90.74 | 13.85 | 0.31 | 0.32 | 0.50 | 0.74 | 0.32 | -0.31 | -0.35 | 0.51 | 1.00 | ||||||||||||
| 10:5th Grade VSM | 45.88 | 8.99 | 0.25 | 0.42 | 0.47 | 0.30 | 0.57 | -0.32 | -0.26 | 0.49 | 0.31 | 1.00 | |||||||||||
| 11:5st Grade Number RT | 23.67 | 5.12 | -0.03 | -0.37 | -0.35 | -0.11 | -0.23 | 0.64 | 0.45 | -0.29 | -0.18 | -0.32 | 1.00 | ||||||||||
| 12:5st Grade Letter RT | 23.29 | 5.36 | -0.14 | -0.34 | -0.34 | -0.22 | -0.19 | 0.54 | 0.44 | -0.34 | -0.26 | -0.36 | 0.78 | 1.00 | |||||||||
| 13:5th Grade NO | 26.58 | 5.38 | 0.40 | 0.45 | 0.49 | 0.36 | 0.37 | -0.28 | -0.27 | 0.48 | 0.28 | 0.36 | -0.20 | -0.21 | 1.00 | ||||||||
| 14:6th Grade NO | 28.66 | 6.82 | 0.45 | 0.51 | 0.51 | 0.41 | 0.43 | -0.33 | -0.33 | 0.55 | 0.33 | 0.42 | -0.23 | -0.23 | 0.82 | 1.00 | |||||||
| 15:7th Grade NO | 31.63 | 8.98 | 0.45 | 0.52 | 0.55 | 0.36 | 0.42 | -0.36 | -0.32 | 0.54 | 0.31 | 0.50 | -0.27 | -0.28 | 0.78 | 0.80 | 1.00 | ||||||
| 16:8th Grade NO | 34.19 | 9.34 | 0.44 | 0.46 | 0.44 | 0.34 | 0.40 | -0.34 | -0.30 | 0.48 | 0.28 | 0.44 | -0.26 | -0.30 | 0.72 | 0.80 | 0.84 | 1.00 | |||||
| 17:9th Grade NO | 36.08 | 8.81 | 0.47 | 0.49 | 0.50 | 0.41 | 0.43 | -0.34 | -0.32 | 0.55 | 0.33 | 0.51 | -0.25 | -0.34 | 0.69 | 0.77 | 0.84 | 0.87 | 1.00 | ||||
| 18:5th Grade WR | 106.97 | 8.61 | 0.53 | 0.30 | 0.50 | 0.49 | 0.30 | -0.42 | -0.44 | 0.56 | 0.47 | 0.38 | -0.30 | -0.44 | 0.52 | 0.51 | 0.53 | 0.51 | 0.56 | 1.00 | |||
| 19:6th Grade WR | 110.18 | 8.61 | 0.54 | 0.27 | 0.51 | 0.54 | 0.26 | -0.39 | -0.44 | 0.53 | 0.52 | 0.36 | -0.24 | -0.36 | 0.45 | 0.46 | 0.50 | 0.48 | 0.53 | 0.90 | 1.00 | ||
| 20:7th Grade WR | 114.16 | 8.02 | 0.52 | 0.31 | 0.51 | 0.48 | 0.27 | -0.39 | -0.40 | 0.46 | 0.46 | 0.39 | -0.28 | -0.38 | 0.50 | 0.47 | 0.55 | 0.49 | 0.53 | 0.90 | 0.91 | 1.00 | |
| 21:8th Grade WR | 115.76 | 7.71 | 0.55 | 0.28 | 0.47 | 0.48 | 0.26 | -0.38 | -0.36 | 0.47 | 0.44 | 0.36 | -0.28 | -0.38 | 0.46 | 0.46 | 0.53 | 0.50 | 0.53 | 0.87 | 0.88 | 0.93 | 1.00 |
| 22:9th Grade WR | 118.31 | 7.38 | 0.55 | 0.28 | 0.53 | 0.53 | 0.34 | -0.37 | -0.40 | 0.52 | 0.49 | 0.39 | -0.24 | -0.37 | 0.46 | 0.46 | 0.51 | 0.48 | 0.54 | 0.88 | 0.89 | 0.91 | 0.92 |
Note: r > 0.15 p < 0.05; r > 0.25, p < 0.01; r > 0.29, p < 0.001; CE = Central Executive; VSM = Visuospatial Memory; PM = Phonological Memory; RT = reaction time; NO = Numerical Operations; WR = Word Reading.