Statistics of Reflections In Peroxide

© Paul Cooijmans

Scores on Reflections In Peroxide as of 8 September 2020

Contents type: Numerical, spatial.   Period: 2010-present

0 *
1 ****
3 *
4 ***
5 *
6 *******
7 ***
8 ***
10 *
11 *

Correlation of Reflections In Peroxide with other tests by I.Q. Tests for the High Range

(Test index) Test name n r
(105) Space, Time, and Hyperspace - Revision 2016130.95
(112) Combined Numerical and Spatial sections of Test For Genius - Revision 2016120.95
(66) Test For Genius - Revision 200460.93
(43) Test For Genius - Revision 201080.93
(46) Labyrinthine LIMIT40.93
(39) Combined Numerical and Spatial sections of Test For Genius - Revision 2010110.92
(27) Spatial section of Test For Genius - Revision 2004130.91
(48) Narcissus' last stand220.91
(0) Test of the Beheaded Man140.90
(1) Cartoons of Shock60.90
(111) Test For Genius - Revision 2016120.89
(42) The Marathon Test90.89
(113) The Piper's Test40.89
(37) Problems In Gentle Slopes of the third degree70.89
(47) Psychometrically Activated Grids Acerbate Neuroticism70.88
(16) Lieshout International Mesospheric Intelligence Test120.87
(30) Verbal section of The Marathon Test90.86
(117) The Hammer Of Test-Hungry - Revision 201370.86
(45) Numerical and spatial sections of The Marathon Test120.85
(31) Numerical section of The Marathon Test120.85
(35) Intelligence Quantifier by assessment110.84
(44) Associative LIMIT90.83
(21) Psychometric Qrosswords70.82
(109) The Bonsai Test - Revision 2016110.82
(103) Problems In Gentle Slopes of the second degree110.81
(68) Numbers40.81
(32) Spatial section of The Marathon Test120.80
(26) Verbal section of Test For Genius - Revision 2004120.80
(2) Cooijmans Intelligence Test - Form 3160.80
(33) Problems In Gentle Slopes of the first degree70.79
(107) The Alchemist Test70.79
(12) Cooijmans On-Line Test - Two-barrelled version110.75
(106) Cooijmans Intelligence Test - Form 4110.73
(40) Reason Behind Multiple-Choice - Revision 2008160.72
(114) Dicing with death40.71
(4) A Paranoiac's Torture: Intelligence Test Utilizing Diabolic Exactitude120.70
(104) The Final Test - Revision 201380.70
(18) The Nemesis Test110.70
(24) Reason - Revision 2008160.70
(28) The Test To End All Tests220.68
(19) Numerical section of Test For Genius - Revision 2010170.66
(108) Verbal section of Test For Genius - Revision 2016120.65
(7) The Final Test70.65
(10) Genius Association Test120.65
(23) Gliaweb Riddled Intelligence Test - Revision 2011120.59
(11) Isis Test160.53
(3) Qoymans Multiple-Choice #5170.52
(80) Qoymans Multiple-Choice #450.49
(5) Daedalus Test100.46
(25) The Sargasso Test130.45
(110) Cooijmans Intelligence Test 590.44

Weighted average of correlations: 0.762 (N = 548, weighted sum = 417.65)

Conservatively estimated minimum g loading: 0.87

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.

Correlation of Reflections In Peroxide with tests by others

(Test index) Test name n r
(239) Titan Test50.90
(242) Unknown and miscellaneous tests110.47
(234) Strict Logic Sequences Exam I40.33

Weighted average of correlations: 0.550 (N = 20, weighted sum = 11.01)

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.

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.

Estimated loadings of Reflections In Peroxide 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 Reflections In Peroxide on that type

N = 402

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

Balanced g loading = 0.85

National medians for Reflections In Peroxide

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 Reflections In Peroxide

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

Correlation of Reflections In Peroxide with personal details

Personalia n r
Educational level240.36
P.S.I.A. True - Revision 200790.34
P.S.I.A. Orderly - Revision 200790.33
Mother's educational level220.30
P.S.I.A. Ethics factor - Revision 200790.27
P.S.I.A. Neurotic - Revision 200790.27
P.S.I.A. Rational - Revision 200790.16
P.S.I.A. System factor - Revision 200790.14
Observed behaviour80.12
P.S.I.A. Cold - Revision 200790.09
P.S.I.A. Just - Revision 200790.04
Father's educational level220.02
Year of birth25-0.02
P.S.I.A. Cruel - Revision 20079-0.05
P.S.I.A. Rare - Revision 20079-0.07
P.S.I.A. Antisocial - Revision 20079-0.11
Gifted Adult's Inventory of Aspergerisms9-0.13
Cooijmans Inventory of Neo-Marxist Attitudes4-0.17
P.S.I.A. Aspergoid - Revision 20079-0.18
P.S.I.A. Introverted - Revision 20079-0.22
P.S.I.A. Deviance factor - Revision 20079-0.27
P.S.I.A. Extreme - Revision 20079-0.29
Disorders (own)23-0.31
Disorders (parents and siblings)23-0.41

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)
00.87 (548)NaN (0)
60.60 (310)0.86 (347)
18NaN (0)0.87 (548)


The brevity of this test (18 items) depresses its reliability.


Scores by age

Age class n median score
65 to 6917.0
50 to 5411.0
45 to 4918.0
40 to 4425.0
35 to 3934.0
30 to 3427.0
25 to 2965.0
22 to 2455.0
20 or 2136.0

N = 25

Scores by year taken

Year taken n median score

ryear taken × median score = 0.02 (N = 25)

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 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. This test has not received enough submissions yet for meaningful item analysis.