## 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**

**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.