ENSDT Prototype Untimed First Norm

1

ENSDT Prototype Untimed First Norm th

Marco Ripà (February 14 , 2014)

Raw score  IQ score conversion formula:

IQ = 3.4921*RAW+70.418

RAW score

IQ (SD = 15)

<4 4 4.5 5 5.5 6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5 12 12.5 13 13.5 14 14.5 15 15.5 16 16.5 17

< 84 84.39 86.13 87.88 89.62 91.37 93.12 94.86 96.61 98.35 100.10 101.85 103.59 105.34 107.09 108.83 110.58 112.32 114.07 115.82 117.56 119.31 121.05 122.80 124.55 126.29 128.04 129.78

17.5 18 18.5 19 19.5 20

131.53 133.28 135.02 136.77 138.51 140.26

2

20.5 21 21.5 22 22.5 23 23.5 24 24.5

142.01 143.75 145.50 147.24 148.99 150.74 152.48 154.23 155.97

25 25.5 26 26.5 27 27.5 28 28.5 29 29.5 30 30.5

157.72 159.47 161.21 162.96 164.70 166.45 168.20 169.94 171.69 173.43 175.18 176.93

31

178.7 (+)

The norming method is based on the ENSDT timed data and norm: Average improvement [1-(Raw untimed/ Raw timed)]% = 27.25%; Repetition correction factor = -3.4% (taking into account Z-scores to the timeduntimed ENSDT raw score, derived from the average improvement above);  Nett average improvement: 23.85%. Thus (basing on the timed norm), the linear (derived) IQ conversion formula would be: Unt(IQ) = 70.418+Unt(RAW)*3.49 70.418+Unt(RAW)*3.4921 21

ENSDT prototype, data and statistics:  Number of testees: Timed = 18; Untimed = 9; Both Both = 6 Raw score range: Timed [9.67, 22.63]; Untimed [17.5, 25.5] Average: Timed = 15.59; Untimed = 22.36 ENSDT IQ average: Timed = 137.8; Untimed = 148.5 Z-Score average: Timed = 138.3; Untimed = 148.1

3

30 y = 1,0385x + 17,171 R² = 0,9584

25 20 15

Serie1

10

Lineare (Serie1)

5 0 0

5

10

200,0 y = 3,4921x + 70,418 R² = 1

150,0

Serie1

100,0

Lineare (Serie1)

50,0 0,0 0

20

40

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ENSDT Prototype (TIMED) Norm: https://app.box.com/s/wqo01pwgcvmave5ps9r8 th

Marco Ripà (January 27 , 2014)

25 y = 0,7016x + 8,9262 R² = 0,9864 20

15 Serie1 Raw score

10

5

0 0

5

10

15

20

4

I Q conve conver sion

Raw score

IQ (SD = 15)

formula:

<3

< 83

IQ=70.418+4.325*raw

3 3.5 4 4.5 5 5.5

83.4 85.6 87.7 89.9 92.0 94.2

6 6.5 7 7.5 8 8.5 9 9.5 10 10.5 11 11.5

96.4 98.5 100.7 102.9 105.0 107.2 109.3 111.5 113.7 115.8 118.0 120.2

12 12.5 13 13.5 14 14.5

122.3 124.5 126.6 128.8 131.0 133.1

15 15.5 16 16.5 17 17.5 18 18.5 19 19.5 20 20.5

135.3 137.5 139.6 141.8 143.9 146.1 148.3 150.4 152.6 154.8 156.9 159.1

21 21.5 22 22.5 23

161.2 163.4 165.6 167.7 169.9

5

23.5 24 24.5 25 25.5 26 26.5 27 27.5

172.1 174.2 176.4 178.5 180.7 182.9 185.0 187.2 189.4

28 28.5 29 29.5 30 30.5

191.5 193.7 195.8 198.0 200.2 202.3

31

204.5 (+)