Tests by Ivan Ivec (aggregate) statistics

Paul Cooijmans


These are statistics based on the scores on the tests by Ivan Ivec (aggregate) as reported by test candidates of I.Q. Tests for the High Range. Please keep the following in mind: As a result of candidates' tendency to report their higher scores while withholding lower ones, there may be an upward bias in the reported scores, while the possible correlation with other variables is reduced as a result of the restriction of range inherent to this incomplete reporting. Also, this report deals with a compound variable, wherein all the tests of a given author are combined. Such a compound variable, too, has reduced potential to correlate with any other variable because of the imperfect intercorrelations of its constituents.

Scores on Tests by Ivan Ivec (aggregate) as of 25 June 2022

124 *
128 *
132 *
133 *
136 *
137 *
139 *
143 ***
144.5 *
145 *
147 ***
148 *
149 *
150 *
152 *
154 *
155 *
156 *
157 *
160 ***
162 *
165 *

Correlation of Tests by Ivan Ivec (aggregate) with other mental ability tests

(Test index) Test name n r
(218) Raven's Advanced Progressive Matrices (I.Q.)40.99
(226) Logima Strictica 24 (Robert Lato)40.99
(260) Tests by Nikolaos Soulios (aggregate)60.97
(1) Cartoons of Shock50.97
(240) Strict Logic Spatial Exam 48 (Jonathan Wai)40.94
(225) Logima Strictica 36 (Robert Lato)80.94
(224) Test of Inductive Reasoning / J.C.T.I. (Xavier Jouve)50.92
(259) Tests by Theodosis Prousalis (aggregate)50.89
(43) Test For Genius - Revision 201070.87
(2) Cooijmans Intelligence Test - Form 3130.86
(111) Test For Genius - Revision 201650.84
(0) Test of the Beheaded Man50.83
(258) Tests by Mislav Predavec (aggregate)70.83
(234) Strict Logic Sequences Exam I (Jonathan Wai)90.82
(223) Strict Logic Sequences Exam II (Jonathan Wai)70.79
(16) Lieshout International Mesospheric Intelligence Test80.71
(242) Unknown and miscellaneous tests230.68
(87) Cooijmans Intelligence Test - Form 240.65
(108) Verbal section of Test For Genius - Revision 201650.61
(28) The Test To End All Tests50.60
(26) Verbal section of Test For Genius - Revision 200480.58
(7) The Final Test50.58
(39) Combined Numerical and Spatial sections of Test For Genius - Revision 201090.56
(107) The Alchemist Test70.54
(103) Problems In Gentle Slopes of the second degree90.54
(19) Numerical section of Test For Genius - Revision 2010150.51
(44) Associative LIMIT80.51
(215) Tests by Jason Betts (aggregate)120.51
(37) Problems In Gentle Slopes of the third degree50.51
(27) Spatial section of Test For Genius - Revision 2004100.42
(23) Gliaweb Riddled Intelligence Test - Revision 2011100.41
(106) Cooijmans Intelligence Test - Form 4100.41
(3) Qoymans Multiple-Choice #590.37
(40) Reason Behind Multiple-Choice - Revision 200890.36
(10) Genius Association Test100.30
(24) Reason - Revision 200890.29
(36) Reflections In Peroxide60.29
(262) Tests by James Dorsey50.27
(110) Cooijmans Intelligence Test 560.25
(25) The Sargasso Test70.18
(18) The Nemesis Test50.18
(201) Wechsler Adult Intelligence Scales70.13
(57) Space, Time, and Hyperspace40.11
(112) Combined Numerical and Spatial sections of Test For Genius - Revision 201670.01
(109) The Bonsai Test - Revision 20166-0.05
(105) Space, Time, and Hyperspace - Revision 20167-0.11
(4) A Paranoiac's Torture: Intelligence Test Utilizing Diabolic Exactitude8-0.11
(31) Numerical section of The Marathon Test4-0.45
(12) Cooijmans On-Line Test - Two-barrelled version4-0.58
(45) Numerical and spatial sections of The Marathon Test4-0.70
(235) Nonverbal Cognitive Performance Examination (Xavier Jouve)4-0.71
(32) Spatial section of The Marathon Test4-0.77

Weighted average of correlations: 0.465 (N = 372, weighted sum = 172.86)

Conservatively estimated minimum g loading: 0.68

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, including possible floor/ceiling scores or outliers.

Estimated loadings of Tests by Ivan Ivec (aggregate) on particular item types

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.

Typeng loading of Tests by Ivan Ivec (aggregate) on that type

N = 213

Compound tests have been left out of this table to avoid overlap.

Balanced g loading = 0.57

National medians for Tests by Ivan Ivec (aggregate)

Country n median score

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 national I.Q.'s of Tests by Ivan Ivec (aggregate)

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

Correlation of Tests by Ivan Ivec (aggregate) with personal details

Personalia n r
P.S.I.A. Just - Revision 200780.83
P.S.I.A. Orderly - Revision 200780.80
P.S.I.A. System factor - Revision 200780.80
P.S.I.A. Introverted - Revision 200780.64
P.S.I.A. Aspergoid - Revision 200780.61
P.S.I.A. Cold - Revision 200780.60
P.S.I.A. Neurotic - Revision 200780.59
P.S.I.A. Rare - Revision 200780.58
P.S.I.A. Deviance factor - Revision 200780.57
P.S.I.A. True - Revision 200780.48
P.S.I.A. Extreme - Revision 200780.47
P.S.I.A. Cruel - Revision 200780.32
Father's educational level230.30
Cooijmans Inventory of Neo-Marxist Attitudes50.25
P.S.I.A. Antisocial - Revision 200780.23
Mother's educational level230.22
P.S.I.A. Ethics factor - Revision 200780.21
Educational level240.19
P.S.I.A. Rational - Revision 200780.07
Gifted Adult's Inventory of Aspergerisms60.04
Observed behaviour70.03
Disorders (parents and siblings)24-0.00
Year of birth27-0.10
Disorders (own)25-0.30

Estimated g factor loadings upward and downward of particular scores

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 scoreUpward g (N)Downward g (N)
1240.68 (372)NaN (0)
1400.53 (317)0.34 (9)
1470.62 (199)0.49 (154)
1540.22 (28)0.65 (255)
165NaN (0)0.68 (372)