Wechsler Adult Intelligence Scales statistics

Introduction

These statistics are based on scores on any form this test as reported by candidates taking I.Q. tests from I.Q. Tests for the High Range.

Scores on Wechsler Adult Intelligence Scales as of 13 January 2026

n: 86
Median: 138.0
Quartile deviation: 10.0
Male median: 137.5 (n = 78)
Female median: 143.5 (n = 8)
Proportion of males among candidates: 0.907
Resolution: 10.0

95	*
103	*
106	*
110	**
112	*
115	*
116	*
117	*
118	**
119	*
120	***
122	*
123	**
124	**
126	*
127	**
128	*
130	**
131	*
132	*
133	**
134	***
135	******
136	**
137	*
138	*****
139	***
140	***
141	***
142	*
143	**
145	**
146	***
147	****
148	*
150	******
152	**
153	*
156	**
157	*
159	**
160	***

Scores by males

n = 78

95	*
103	*
106	*
110	**
112	*
115	*
116	*
117	*
118	**
119	*
120	***
122	*
123	**
124	**
127	**
130	**
131	*
132	*
133	**
134	***
135	******
136	*
137	*
138	*****
139	***
140	**
141	***
142	*
143	**
145	**
146	***
147	***
148	*
150	***
152	**
153	*
156	**
157	*
159	**
160	***

Scores by females

n = 8

126	*
128	*
136	*
140	*
147	*
150	***

Correlation of Wechsler Adult Intelligence Scales with other mental ability tests

Test name	n	r	p value
Concep-T (Laurent Dubois)	4	1.00	0.08
De Laatste Test - Herziening 2019	4	0.96	0.10
Stanford-Binet childhood scores	5	0.93	0.06
Test of Inductive Reasoning / J.C.T.I. (Xavier Jouve)	5	0.93	0.06
Cattell Culture Fair	10	0.92	0.006
Problems In Gentle Slopes of the first degree	5	0.91	0.07
Strict Logic Sequences Examination II (Jonathan Wai)	4	0.91	0.12
Strict Logic Sequences Examination I (Jonathan Wai)	10	0.85	0.01
Numerical and spatial sections of The Marathon Test	5	0.85	0.09
916 Test (Laurent Dubois)	4	0.82	0.16
Problems In Gentle Slopes of the second degree	7	0.81	0.05
Verbal section of Test For Genius - Revision 2016	10	0.79	0.02
Dicing with death	6	0.79	0.08
The Alchemist Test (Anas El Husseini)	5	0.73	0.14
International High IQ Society tests (aggregate)	10	0.70	0.04
Tests by Greg Grove (aggregate)	8	0.69	0.07
Test For Genius - Revision 2016	10	0.69	0.04
The Nemesis Test	7	0.67	0.10
A Relaxing Test (David Miller)	5	0.65	0.19
Tests by Xavier Jouve, other than those listed separately (aggregate)	5	0.65	0.19
Tests by Mislav Predavec (aggregate)	5	0.65	0.19
Cooijmans Intelligence Test 5	9	0.62	0.08
Test of the Beheaded Man	11	0.62	0.05
Titan Test (Ronald K. Hoeflin)	4	0.61	0.28
Associative LIMIT	13	0.60	0.04
Odds	4	0.58	0.32
Combined Numerical and Spatial sections of Test For Genius - Revision 2016	11	0.57	0.07
Test of Shock and Awe	4	0.57	0.34
Space, Time, and Hyperspace - Revision 2016	11	0.56	0.07
Chimera High Ability Riddle Test (Bill Bultas)	4	0.56	0.34
Scholastic Aptitude Test (old)	6	0.55	0.22
Genius Association Test	19	0.53	0.03
The Piper's Test	4	0.52	0.37
Miscellaneous tests	39	0.51	0.002
Qoymans Multiple-Choice #5	12	0.50	0.10
Logima Strictica 36 (Robert Lato)	9	0.50	0.15
Evens	4	0.50	0.38
Cooijmans Intelligence Test - Form 4	12	0.50	0.10
The Sargasso Test	13	0.49	0.10
Qoymans Multiple-Choice #2	6	0.49	0.27
Cooijmans Intelligence Test - Form 3	18	0.47	0.05
Reflections In Peroxide	10	0.46	0.16
Gliaweb Riddled Intelligence Test - Revision 2011	11	0.46	0.14
Raven's Advanced Progressive Matrices (I.Q.)	10	0.46	0.16
Only idiots	4	0.46	0.42
Analogies of Long Test For Genius	5	0.46	0.37
Cooijmans Intelligence Test - Form 2	11	0.45	0.15
Epiq Tests (aggregate)	7	0.45	0.27
Mega Test (Ronald K. Hoeflin)	5	0.44	0.38
Psychometric Qrosswords	4	0.43	0.46
Qoymans Multiple-Choice #4	12	0.42	0.16
Reason Behind Multiple-Choice - Revision 2008	12	0.41	0.17
Spatial section of The Marathon Test	6	0.40	0.37
Divine Psychometry (Matthew Scillitani)	4	0.40	0.48
Non-Verbal Cognitive Performance Examination (Xavier Jouve)	5	0.39	0.42
Problems In Gentle Slopes of the third degree	9	0.39	0.27
Cartoons of Shock	5	0.39	0.44
Tests by Ivan Ivec (aggregate)	9	0.37	0.28
The Final Test	14	0.37	0.18
Narcissus' last stand	8	0.35	0.36
Lieshout International Mesospheric Intelligence Test	16	0.35	0.18
Numerical section of Test For Genius - Revision 2010	12	0.33	0.27
Long Test For Genius	5	0.32	0.52
Isis Test	9	0.32	0.37
Test For Genius - Revision 2004	9	0.31	0.38
Spatial section of Test For Genius - Revision 2004	12	0.28	0.36
Culture Fair Numerical Spatial Examination - Final version (Etienne Forsström)	5	0.25	0.62
The Bonsai Test - Revision 2016	10	0.24	0.46
Association subtest of Long Test For Genius	7	0.24	0.54
The Marathon Test	6	0.22	0.62
A Paranoiac's Torture: Intelligence Test Utilizing Diabolic Exactitude	6	0.21	0.64
Reason Behind Multiple-Choice	4	0.21	0.71
Numerical section of The Marathon Test	6	0.21	0.64
Raven's Advanced Progressive Matrices (raw)	8	0.21	0.57
The Test To End All Tests	9	0.18	0.62
Strict Logic Spatial Examination 48 (Jonathan Wai)	5	0.17	0.74
Reason - Revision 2008	13	0.16	0.57
Numbers	9	0.15	0.68
Verbal section of Test For Genius - Revision 2004	12	0.14	0.64
Verbal section of The Marathon Test	7	0.13	0.74
Cooijmans Intelligence Test - Form 1	4	0.06	0.92
Bonsai Test	4	0.05	0.94
The Smell Test	4	0.04	0.94
Qoymans Multiple-Choice #1	8	0.03	0.94
Space, Time, and Hyperspace	11	0.02	0.94
Reason	4	-0.01	1.00
Cooijmans On-Line Test - Two-barrelled version	5	-0.06	0.90
Logima Strictica 24 (Robert Lato)	4	-0.07	0.90
Tests by Jason Betts (aggregate)	9	-0.20	0.57
Omega Contemplative Items Pool (Tommy Smith)	6	-0.26	0.54
Qoymans Multiple-Choice #3 (batch scored by Paul Cooijmans)	4	-0.35	0.54
Advanced Intelligence Test (Randy Myers)	5	-0.50	0.32
W-87 (International Society for Philosophical Enquiry)	7	-0.60	0.14
Labyrinthine LIMIT	4	-0.64	0.27
Tests by Paul Laurent Miranda (aggregate)	4	-0.78	0.18
Daedalus Test	4	-0.87	0.13

Weighted mean of correlations: 0.402 (N = 755)

Estimated g factor loading: 0.63

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 Wechsler Adult Intelligence Scales 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.

Type	n	g loading of Wechsler Adult Intelligence Scales on that type
Verbal	133	0.60
Numerical	49	0.69
Spatial	79	0.51
Logical	26	0.35
Heterogeneous	243	0.69

N = 530

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

Balanced g loading = 0.57

Correlation of Wechsler Adult Intelligence Scales with personal details

Personalia	n	r	p value
PSIA Rational - Revision 2007	13	0.32	0.27
PSIA Extreme - Revision 2007	13	0.30	0.30
PSIA Orderly - Revision 2007	13	0.25	0.38
PSIA Ethics factor - Revision 2007	13	0.19	0.50
PSIA Deviance factor - Revision 2007	13	0.18	0.54
PSIA System factor - Revision 2007	13	0.15	0.60
PSIA Cold - Revision 2007	13	0.13	0.64
Observed associative horizon	12	0.07	0.81
PSIA True - Revision 2007	13	0.07	0.81
PSIA Aspergoid - Revision 2007	13	0.04	0.90
PSIA Introverted - Revision 2007	13	0.04	0.90
Educational level	50	0.03	0.81
PSIA Just - Revision 2007	13	0.01	0.97
Mother's educational level	44	-0.01	0.94
Father's educational level	44	-0.01	0.94
Disorders (parents and siblings)	47	-0.03	0.87
Gifted Adult's Inventory of Aspergerisms	20	-0.07	0.74
Sex	86	-0.11	0.32
Year of birth	76	-0.13	0.27
Observed behaviour	21	-0.16	0.46
PSIA Antisocial - Revision 2007	13	-0.23	0.42
Disorders (own)	55	-0.30	0.03
PSIA Rare - Revision 2007	13	-0.37	0.20
Cooijmans Inventory of Neo-Marxist Attitudes	8	-0.39	0.30
PSIA Cruel - Revision 2007	13	-0.41	0.15
PSIA Neurotic - Revision 2007	13	-0.74	0.01

Notice: A correlation is generally considered significant if its p value is 0.05 or less.

Estimated g factor loadings for restricted ranges

The goal of estimated g factor loadings for restricted ranges 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 these values to be lower than the test's full-range g loading.

Below 1st quartile (127.0)	0.64 (N = 90)
Below median (138.0)	0.52 (N = 394)
Above median (138.0)	0.56 (N = 332)
Above 3rd quartile (147.0)	0.36 (N = 91)

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