VCAAN

VCAA Statistics

Last Revision : December 16th, 2017.

1. 2nd Norm

Raw Score IQ (sd15) Rarity (1/x) Raw Score IQ (sd15) Rarity (1/x)
21 <=121 31 145 741
22 123 16 32 148 1,455
23 126 24 33 152 3,795
24 128 32 34 156 10,581
25 131 52 35 160 31,560
26 133 72 36 164 100,730
27 134 85 37 168 344,141
28 135 102 38 172 1,258,887
29 138 177 39 180 20,696,863
30 141 319 40 190 1,009,976,678

2. Histogram

VCAA 2nd

3. Statistical Properties & Correlations with other tests
Calculated mean on reported scores on standard supervised tests is 138.437 sd15 (N=16). Mean raw score of this sample on VCAA is 30.875.

Parameter Value Test Score Pairs (n) r
Mean 31 Standard* 16 0.799
Median 32 WAIS 7 0.827
Stand. Deviation 4.604 RAPM 3 0.771
Variance 21.2 Jouve** 19 0.848
SEM 0.694 JCCES 4 0.811
Kurtosis 1.787 JCTI 6 0.803
Skewness -1.001 C-09 4 0.846
Cronbach’s a 0.919

* Tests used : WAIS, RAPM, MAT, IST70, SBIS, ACT, Cattell IIIB, Unknown Mensa Entrance Test.
** Tests used : JCTI, NVCPE-R, CSE, TLAP-R, JCCES, C-09, C-10.

4. Notes
To sum up, VCAA shows high positive correlation with standard supervised IQ tests (r=0.799) -especially with WAIS (r=0.827)- and excellent reliability (Cronbach’s alpha=0.919), a fact that makes it a reliable tool for estimating one’s intelligence quotient. Next norm will be generated after a total of 75 submissions.

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