Statistics of Odds

© October 2010 Paul Cooijmans

Norms

Scores

1 *
2 *
3 **
4 *
6 **
7 *
8 ****
9 ***
10 ***
12 ***
13 *****
14 **

Correlation with other tests by Paul Cooijmans

Test n r
Qoymans Multiple-Choice #240.96
Lieshout International Mesospheric Intelligence Test70.79
Associative LIMIT Test40.76
Genius Association Test70.73
Numbers140.72
Association subtest of Long Test For Genius50.66
Cooijmans Intelligence Test - Form 260.64
Evens60.55
Analogies of Long Test For Genius40.37
Bonsai Test60.36
Long Test For Genius40.29
Test of Shock and Awe40.21
Spatial section of Test For Genius - Revision 200480.11
Test For Genius - Revision 200480.11
The Final Test80.07
Verbal section of Test For Genius - Revision 200480.05
Qoymans Multiple-Choice #48-0.03
Space, Time and Hyperspace7-0.05
Qoymans Multiple-Choice #14-0.19
Cartoons of Shock5-0.28
Qoymans Multiple-Choice #36-0.65
The Test To End All Tests4-0.78

Weighted average of correlations: 0.266

Conservatively estimated minimum g loading: 0.52

Ranking in above table is based on the unrounded correlations. All available data is present in this table, no tests are left out except for those with less than 4 score pairs. All known pairs are used to obtain the true, honest statistics; correlations have not been artificially inflated by leaving out ceiling scores, outliers or other anomalies.

Correlation with tests by others

Test n r
Omega Contemplative Items Pool40.98
Mega Test40.98
Logima Strictica 3660.69
Strict Logic Sequences Exam I70.64
Cattell Culture Fair5-0.08
Nonverbal Cognitive Performance Examination6-0.11

Weighted average of correlations: 0.481

Ranking in above table is based on the unrounded correlations. All available data is present in this table, no tests are left out except for those with less than 4 score pairs. All known pairs are used to obtain the true, honest statistics; correlations have not been artificially inflated by leaving out ceiling scores, outliers or other anomalies.

Please be aware that correlations with these external tests are in most cases affected (depressed, typically) by one or more of the following: 1) Little overlap with the object test because of the much lower ceilings and inherent ceiling effects of the tests used in regular psychology; 2) Candidates reporting scores selectively, for instance only the higher ones while withholding lower ones; 3) Candidates reporting, or having been reported by psychometricians, incorrect scores.

National medians

Country n Median score
Spain211.5
United_States38.0
Greece37.0
Netherlands24.0

For reasons of privacy, only countries with 2 or more candidates are included in this table. Ranking is based on the medians, and then alphabetic.

Correlation with personal details

Personalia n r
P.S.I.A. True70.69
P.S.I.A. System factor50.68
P.S.I.A. Rare70.67
P.S.I.A. Rational70.65
P.S.I.A. Just70.42
P.S.I.A. Extreme70.41
Is male270.40
P.S.I.A. Antisocial70.38
P.S.I.A. Deviance factor110.34
Observed behaviour is good50.33
P.S.I.A. Aspergoid70.33
P.S.I.A. Ethics factor110.29
P.S.I.A. Introverted70.11
Disorders (own)200.06
P.S.I.A. Neurotic70.05
P.S.I.A. Orderly7-0.07
P.S.I.A. Cold7-0.10
Disorders (parents and siblings)20-0.11
Year of birth25-0.11
Father's educational level20-0.12
Educational level20-0.13
P.S.I.A. Cruel7-0.14
Mother's educational level20-0.15
Gifted Adult's Inventory of Aspergerisms4-0.80

Correlation with national I.Q.s

Correlation of this test with national average I.Q.s published by Lynn and Vanhanen:

Estimated g factor loadings Upward and Downward of specific scores

In parentheses the number of score pairs on which that estimated g factor loading is based. The Upward and Downward values are calculated including the pertinent score itself. It is normal that g factor loadings go down when the range is restricted like this, but careful study of the Upward and Downward columns may reveal possible scores below or above which the test loses validity altogether.

ScoreUpward (n)Downward (n)
0.54 (244)NaN (0)
3.53 (232)-.75 (9)
6.30 (165).42 (37)
9-.17 (102).47 (140)
12-.54 (25).54 (217)
15NaN (0).54 (244)

Reliability

Error

Scores by age

Age class n Median score
60 to 64213.5
55 to 5918.0
40 to 44310.0
35 to 3912.0
30 to 3437.0
25 to 2969.0
22 to 24312.0
20 or 21411.0
1719.0

Scores by year taken

Year taken n Median score
2002108.0
2003210.0
2004510.0
2005113.0
200619.0
200758.0
200828.0
2009113.0
2010112.0

ryear taken × median score = 0.35
n = 28

Robustness and overall test quality

Item analysis

Item statistics are not published as that would help future candidates. To detect bad items, answers and comments from candidates are studied, as well as, for each problem, the correlation with total score (validity of the item in this test) and the proportion of candidates getting it wrong (hardness of the item). Possible bad items are removed or revised, resulting in a revised version of the test.