1 | ** |
6 | ** |
7 | * |
8 | * |
9 | * |
12 | * |
16 | * |
18 | * |
21 | * |
22 | ** |
23 | **** |
24 | * |
25 | * |
27 | * |
28 | ***** |
30 | *** |
32 | * |
33 | * |
(Test index) Test name | n | r |
---|---|---|
(42) The Marathon Test | 7 | 0.98 |
(32) Spatial section of The Marathon Test | 8 | 0.97 |
(45) Numerical and spatial sections of The Marathon Test | 7 | 0.97 |
(21) Psychometric Qrosswords | 6 | 0.97 |
(31) Numerical section of The Marathon Test | 8 | 0.95 |
(48) Narcissus' last stand | 7 | 0.94 |
(30) Verbal section of The Marathon Test | 7 | 0.93 |
(44) Associative LIMIT | 10 | 0.92 |
(103) Problems In Gentle Slopes of the second degree | 5 | 0.92 |
(54) Test of Shock and Awe | 5 | 0.92 |
(43) Test For Genius - Revision 2010 | 5 | 0.92 |
(39) Combined Numerical and Spatial sections of Test For Genius - Revision 2010 | 6 | 0.91 |
(1) Cartoons of Shock | 13 | 0.91 |
(36) Reflections In Peroxide | 7 | 0.89 |
(19) Numerical section of Test For Genius - Revision 2010 | 7 | 0.89 |
(80) Qoymans Multiple-Choice #4 | 10 | 0.86 |
(16) Lieshout International Mesospheric Intelligence Test | 14 | 0.85 |
(40) Reason Behind Multiple-Choice - Revision 2008 | 14 | 0.85 |
(35) Intelligence Quantifier by assessment | 11 | 0.85 |
(55) Spatial Insight Test | 5 | 0.84 |
(28) The Test To End All Tests | 10 | 0.82 |
(23) Gliaweb Riddled Intelligence Test - Revision 2011 | 5 | 0.82 |
(7) The Final Test | 11 | 0.81 |
(24) Reason - Revision 2008 | 14 | 0.80 |
(2) Cooijmans Intelligence Test - Form 3 | 13 | 0.78 |
(18) The Nemesis Test | 11 | 0.78 |
(25) The Sargasso Test | 12 | 0.78 |
(106) Cooijmans Intelligence Test - Form 4 | 7 | 0.77 |
(3) Qoymans Multiple-Choice #5 | 14 | 0.77 |
(26) Verbal section of Test For Genius - Revision 2004 | 16 | 0.75 |
(66) Test For Genius - Revision 2004 | 11 | 0.74 |
(4) A Paranoiac's Torture: Intelligence Test Utilizing Diabolic Exactitude | 7 | 0.72 |
(62) Reason Behind Multiple-Choice | 7 | 0.70 |
(33) Problems In Gentle Slopes of the first degree | 5 | 0.69 |
(11) Isis Test | 8 | 0.64 |
(27) Spatial section of Test For Genius - Revision 2004 | 16 | 0.64 |
(12) Cooijmans On-Line Test - Two-barrelled version | 7 | 0.62 |
(87) Cooijmans Intelligence Test - Form 2 | 6 | 0.58 |
(47) Psychometrically Activated Grids Acerbate Neuroticism | 5 | 0.58 |
(10) Genius Association Test | 10 | 0.58 |
(82) Reason | 8 | 0.54 |
(5) Daedalus Test | 8 | 0.27 |
Weighted average of correlations: 0.791
Conservatively estimated minimum g loading: 0.89
(Test index) Test name | n | r |
---|---|---|
(234) Strict Logic Sequences Exam I | 6 | 0.91 |
(225) Logima Strictica 36 | 6 | 0.80 |
(242) Unknown and miscellaneous tests | 12 | 0.37 |
Weighted average of correlations: 0.610
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.
These are estimated g factor loadings, but against homogeneous tests (containing only particular item types) as opposed to non-compound heterogeneous tests. Although tending to surprise the lay person, it is not uncommon for tests to have high loadings on item types they do not actually contain themselves. Such loadings reflect the empirical fact that most tests for mental abilities measure primarily g, regardless of their contents; that the major part of test score variance is caused by g, and only a minor part by factors germane to particular item types. It is of key importance to understand that this is a fact of nature, a natural phenomenon, and not something that was built into the tests by the test constructors.
Type | g loading of Test of the Beheaded Man on that type |
---|---|
Verbal | 0.89 |
Numerical | 0.96 |
Spatial | 0.89 |
Logical | 0.77 |
Heterogeneous | 0.88 |
Balanced g loading = 0.88
Country | n | median score |
---|---|---|
Netherlands | 2 | 29.0 |
Belgium | 2 | 28.0 |
Spain | 2 | 27.5 |
United_States | 8 | 17.0 |
Canada | 2 | 14.5 |
Correlation of this test with national average I.Q.'s published by Lynn and Vanhanen:
Personalia | n | r |
---|---|---|
Candidate's self-estimated I.Q. | 5 | 0.67 |
Cooijmans Inventory of Neo-Marxist Attitudes | 8 | 0.62 |
Educational level | 27 | 0.62 |
Observed associative horizon | 4 | 0.52 |
P.S.I.A. Rational | 10 | 0.23 |
P.S.I.A. Neurotic | 10 | 0.22 |
P.S.I.A. Antisocial | 10 | 0.19 |
Sex | 30 | 0.17 |
P.S.I.A. Cruel | 10 | 0.16 |
P.S.I.A. Orderly | 10 | 0.07 |
P.S.I.A. Rare | 10 | 0.04 |
P.S.I.A. True | 10 | -0.04 |
P.S.I.A. Ethics factor | 11 | -0.11 |
P.S.I.A. Cold | 10 | -0.14 |
P.S.I.A. System factor | 6 | -0.18 |
Father's educational level | 26 | -0.20 |
Gifted Adult's Inventory of Aspergerisms | 7 | -0.22 |
P.S.I.A. Aspergoid | 10 | -0.25 |
Year of birth | 30 | -0.29 |
P.S.I.A. Introverted | 10 | -0.35 |
Mother's educational level | 26 | -0.40 |
P.S.I.A. Deviance factor | 11 | -0.43 |
Disorders (own) | 27 | -0.49 |
Disorders (parents and siblings) | 27 | -0.51 |
P.S.I.A. Just | 10 | -0.55 |
P.S.I.A. Extreme | 10 | -0.55 |
Observed behaviour | 6 | -0.71 |
In parentheses the number of score pairs on which that estimated g factor loading is based. The goal of this is to verify the hypothesis that g becomes less important, accounts for a smaller proportion of the variance, at higher I.Q. levels. The mere fact of restricting the range like this also depresses the g loading compared to computing it over the test's full range, so it would be normal for both values to be lower than the test's full-range g loading.
Raw score | Upward g (n) | Downward g (n) |
---|---|---|
0 | 0.89 (373) | NaN (0) |
15 | 0.83 (219) | 0.85 (27) |
23 | 0.73 (81) | 0.86 (232) |
31 | NaN (0) | 0.88 (341) |
40 | NaN (0) | 0.89 (373) |
Age class | n | median score |
---|---|---|
50 to 54 | 3 | 8.0 |
45 to 49 | 3 | 28.0 |
40 to 44 | 4 | 26.5 |
35 to 39 | 8 | 25.0 |
30 to 34 | 1 | 23.0 |
25 to 29 | 5 | 23.0 |
22 to 24 | 5 | 22.0 |
20 or 21 | 1 | 12.0 |
Year taken | n | median score |
---|---|---|
2006 | 7 | 24.0 |
2007 | 3 | 28.0 |
2008 | 1 | 22.0 |
2009 | 1 | 16.0 |
2010 | 2 | 19.5 |
2011 | 1 | 8.0 |
2012 | 4 | 24.0 |
2013 | 3 | 18.0 |
2014 | 2 | 15.0 |
2015 | 3 | 6.0 |
2016 | 3 | 12.0 |
ryear taken × median score = -0.70 (n = 30)
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 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. There is currently no reason to revise this test.