VRAIIS

VRA Form II Statistics

Last Revision : September 2nd, 2018.

1. 3rd Norm

Raw Score IQ (sd15) Raw Score IQ (sd15)
9 <80 25 127
10 83 26 130
11 86 27 133
12 89 28 136
13 92 29 139
14 95 30 142
15 97 31 144
16 100 32 147
17 103 33 150
18 106 34 153
19 109 35 156
20 112 36 160
21 115 37 164
22 118 38 169
23 121 39 175
24 124 40 184

2. Histogram
3rdnormgraph

3. Statistical Properties & Correlations with other tests
Calculated mean on reported scores on standard supervised tests is 139.48 sd15 (N=31). Mean raw score of this sample on VRA Form II is 28.58.

Parameter Value Test Score Pairs (n) r
Mean 31.023 Standard* 31 0.698
Median 32 WAIS (FSIQ)
8 0.844
Stand. Deviation 5.099 RAPM 6 0.947
Variance 26.305 CCFIT III
5 0.821
SEM 0.553 Jouve** 30 0.622
Kurtosis 1.882 C-09 7 0.797
Skewness -1.23 C-10 4 0.85
Cronbach’s a 0.928 JCTI 7 0.82
JCCES 6 0.908

* Tests used : WAIS, RAPM, FRT-B, FRT-A, CCFIT III, OLSAT, IBF-S, IST70R, SBIS, Unknown Mensa Entrance Test.
** Tests used : JCTI, NVCPE-R, TLAP-R, JCCES, C-09, C-10, CCAT.

4. Notes

To sum up, VRA Form II shows high positive correlation with standard supervised IQ tests (r=0.698 – 0.844 with WAIS FSIQ) and reliability (Cronbach’s alpha=0.928), a fact that makes it a reliable tool for estimating one’s intelligence quotient. The fact that this questionnaire measures IQ >131 after one completes successfully more than its half, makes it a wide(r) range estimation tool. Do note, in addition, the excellent, yet preliminary, correlation with JCCES, a battery estimating crystallized intelligence, for which VRA Form II seems an appropriate tool, too, due to the nature of its items. Next and final norm will be generated after a total of 120 submissions.

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