Table 2.
1 High-high (n=85) |
2 Low-high (n=137) |
3 Low-low (n=42) |
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Variable | M | SD | M | SD | M | SD | F(comparison) |
VD | |||||||
Age 4.4 | 9.40 | 2.96 | 4.09 | 2.47 | 5.93 | 3.16 | 97.54**(1>3>2) |
Age 5.4 | 11.76 | 3.03 | 6.27 | 2.96 | 5.85 | 3.10 | 98.77**(1>2=3) |
Age 6.4 | 16.48 | 3.22 | 12.55 | 3.47 | 11.63 | 3.28 | 44.28**(1>2=3) |
Age 7.4 | 20.12 | 4.06 | 15.55 | 4.06 | 12.54 | 3.70 | 58.05**(1>2>3) |
Age 8.4 | 28.45 | 4.18 | 23.55 | 4.99 | 17.85 | 5.04 | 71.81**(1>2>3) |
Age 10.4 | 50.91 | 6.45 | 47.30 | 6.40 | 33.28 | 7.19 | 102.00**(1>2>3) |
SD | |||||||
Age 4.4 | 9.52 | 4.51 | 7.34 | 4.85 | 7.98 | 4.82 | 5.59**(1>2) |
Age 5.4 | 13.01 | 2.50 | 11.60 | 2.99 | 10.74 | 3.70 | 9.87**(1>2=3) |
Age 6.4 | 14.71 | 2.29 | 14.06 | 2.84 | 12.33 | 3.79 | 9.80**(1>2>3) |
TD | |||||||
Age 7.4 | 18.35 | 4.62 | 17.23 | 4.74 | 15.36 | 5.16 | 5.56**(1=2>3) |
Age 8.4 | 18.29 | 4.96 | 18.36 | 4.84 | 16.00 | 5.01 | 3.94*(1=2>3) |
Age 9.4 | 20.28 | 4.34 | 19.96 | 4.26 | 17.95 | 5.17 | 4.14*(1=2>3) |
MC | |||||||
Age 4.4 | 11.87 | 1.92 | 9.37 | 3.25 | 9.19 | 3.97 | 20.39**(1>2=3) |
Age 5.4 | 13.05 | 2.66 | 10.77 | 3.24 | 10.79 | 3.38 | 15.57**(1>2=3) |
Age 6.4 | 11.81 | 3.18 | 10.20 | 2.97 | 9.76 | 3.67 | 8.80**(1>2=3) |
MP | |||||||
Age 7.4 | 15.02 | 4.25 | 13.42 | 3.51 | 10.50 | 4.09 | 19.38**(1>2>3) |
Age 8.4 | 18.68 | 3.53 | 17.01 | 3.75 | 13.61 | 4.43 | 24.72**(1>2>3) |
Age 9.4 | 22.24 | 2.74 | 20.42 | 3.36 | 17.54 | 3.94 | 28.73**(1>2>3) |
Age 10.4 | 23.95 | 3.14 | 22.16 | 3.45 | 19.25 | 4.04 | 25.52**(1>2>3) |
OJ | |||||||
Age 6.4 | 42.51 | 5.72 | 42.45 | 4.98 | 41.57 | 4.13 | <1(1=2=3) |
Age 7.4 | 54.91 | 5.64 | 54.04 | 6.22 | 51.14 | 7.03 | 5.34**(1=2>3) |
Age 8.4 | 59.67 | 3.46 | 59.48 | 3.32 | 57.12 | 5.26 | 7.45**(1=2>3) |
RN | |||||||
Age 5.4 | 20.46 | 6.23 | 23.68 | 7.89 | 26.13 | 7.16 | 9.66**(1<2=3) |
Age 6.4 | 16.61 | 5.51 | 17.01 | 5.00 | 18.90 | 5.44 | 2.82**(1<3) |
Age 7.4 | 11.45 | 3.03 | 12.30 | 3.47 | 14.00 | 3.84 | 7.95**(1=2<3) |
Age 8.4 | 9.58 | 2.20 | 10.21 | 2.71 | 11.85 | 2.98 | 10.46**(1=2<3) |
Age 9.4 | 8.54 | 2.13 | 8.22 | 2.16 | 9.94 | 2.63 | 9.54**(1=2<3) |
Age 10.4 | 8.04 | 0.84 | 8.06 | 0.97 | 9.32 | 1.14 | 7.39**(1=2<3) |
CR1 | 126.54 | 9.63 | 123.26 | 11.18 | 116.23 | 15.18 | 11.09**(1>2>3) |
RF1 | 1303.40 | 460.89 | 1126.00 | 339.48 | 883.27 | 331.71 | 16.81**(1>2>3) |
RC1 | 32.33 | 5.21 | 29.82 | 6.52 | 26.62 | 7.82 | 11.35**(1>2>3) |
IQ2 | 11.12 | 2.67 | 9.77 | 2.11 | 10.33 | 2.62 | 8.44**(1>2) |
ME | 4.84 | 1.03 | 4.48 | 1.01 | 4.43 | 0.94 | 3.86**(1>2=3) |
Note 1: ME=Mother's Education.
Tested at age 11.4.
Tested at age 4.4.
Note 2: Scores were calculated in seconds in the RN (Rapid Digit Naming task). Thus the quicker, the better.