Statistics of Reflections In Peroxide

© Paul Cooijmans

Scores on Reflections In Peroxide as of 10 August 2021

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

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

(Test index) Test name n r
(118) Divine Psychometry50.98
(105) Space, Time, and Hyperspace - Revision 2016200.94
(112) Combined Numerical and Spatial sections of Test For Genius - Revision 2016190.94
(66) Test For Genius - Revision 200460.93
(43) Test For Genius - Revision 201080.93
(46) Labyrinthine LIMIT40.93
(1) Cartoons of Shock70.92
(48) Narcissus' last stand270.92
(39) Combined Numerical and Spatial sections of Test For Genius - Revision 2010110.92
(42) The Marathon Test110.91
(27) Spatial section of Test For Genius - Revision 2004130.91
(111) Test For Genius - Revision 2016150.89
(47) Psychometrically Activated Grids Acerbate Neuroticism70.88
(30) Verbal section of The Marathon Test110.88
(0) Test of the Beheaded Man180.88
(45) Numerical and spatial sections of The Marathon Test150.87
(31) Numerical section of The Marathon Test160.86
(35) Intelligence Quantifier by assessment150.84
(15) Letters40.84
(107) The Alchemist Test110.82
(21) Psychometric Qrosswords70.82
(33) Problems In Gentle Slopes of the first degree100.82
(41) The LAW - Letters And Words40.82
(68) Numbers40.81
(32) Spatial section of The Marathon Test150.80
(26) Verbal section of Test For Genius - Revision 2004120.80
(109) The Bonsai Test - Revision 2016170.80
(29) Words40.80
(44) Associative LIMIT140.79
(37) Problems In Gentle Slopes of the third degree150.79
(16) Lieshout International Mesospheric Intelligence Test170.78
(103) Problems In Gentle Slopes of the second degree150.77
(113) The Piper's Test100.75
(40) Reason Behind Multiple-Choice - Revision 2008220.75
(114) Dicing with death90.75
(106) Cooijmans Intelligence Test - Form 4140.75
(24) Reason - Revision 2008220.74
(2) Cooijmans Intelligence Test - Form 3220.72
(4) A Paranoiac's Torture: Intelligence Test Utilizing Diabolic Exactitude160.72
(28) The Test To End All Tests270.71
(117) The Hammer Of Test-Hungry - Revision 201380.68
(12) Cooijmans On-Line Test - Two-barrelled version120.67
(23) Gliaweb Riddled Intelligence Test - Revision 2011160.67
(108) Verbal section of Test For Genius - Revision 2016150.65
(7) The Final Test70.65
(10) Genius Association Test170.64
(18) The Nemesis Test130.63
(19) Numerical section of Test For Genius - Revision 2010240.60
(25) The Sargasso Test170.59
(11) Isis Test200.55
(3) Qoymans Multiple-Choice #5220.50
(80) Qoymans Multiple-Choice #450.49
(104) The Final Test - Revision 201390.48
(5) Daedalus Test100.46
(110) Cooijmans Intelligence Test 5160.43
(115) De Laatste Test - Herziening 201940.32

Weighted average of correlations: 0.752 (N = 734, weighted sum = 552.17)

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 tests140.41
(234) Strict Logic Sequences Exam I40.33
(201) Wechsler Adult Intelligence Scales40.17

Weighted average of correlations: 0.451 (N = 27, weighted sum = 12.19)

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 = 552

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
P.S.I.A. Orderly - Revision 2007130.46
P.S.I.A. True - Revision 2007130.31
Educational level330.30
P.S.I.A. Ethics factor - Revision 2007130.22
Observed behaviour120.12
P.S.I.A. Rational - Revision 2007130.09
P.S.I.A. Cruel - Revision 200713-0.00
Father's educational level31-0.01
P.S.I.A. System factor - Revision 200713-0.02
P.S.I.A. Cold - Revision 200713-0.08
P.S.I.A. Neurotic - Revision 200713-0.08
Gifted Adult's Inventory of Aspergerisms10-0.09
Disorders (own)32-0.12
Mother's educational level31-0.13
P.S.I.A. Introverted - Revision 200713-0.15
Year of birth35-0.17
Cooijmans Inventory of Neo-Marxist Attitudes6-0.20
P.S.I.A. Just - Revision 200713-0.27
P.S.I.A. Extreme - Revision 200713-0.28
P.S.I.A. Antisocial - Revision 200713-0.29
P.S.I.A. Deviance factor - Revision 200713-0.31
P.S.I.A. Aspergoid - Revision 200713-0.32
Disorders (parents and siblings)32-0.33
P.S.I.A. Rare - Revision 200713-0.45

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 (734)NaN (0)
30.74 (547)0.33 (101)
4.50.68 (469)0.71 (202)
60.69 (457)0.83 (457)
7.50.56 (77)0.82 (551)
18NaN (0)0.87 (734)


The brevity of this test (18 items) depresses its reliability, together with the fact that most of the raw scores are concentrated in a fairly narrow range, which makes the test behave like an even shorter test.


Scores by age

Age class n median score
65 to 6926.5
60 to 6417.0
50 to 5411.0
45 to 4918.0
40 to 4457.0
35 to 3945.5
30 to 3436.0
25 to 2986.0
22 to 2464.5
20 or 2136.0

N = 35

Scores by year taken

Year taken n median score

ryear taken × median score = 0.04 (N = 36)

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.