High-range I.Q. scores by age group

© 7 February 2025 Paul Cooijmans

Introduction

This report focuses on performance by age on tests scored by I.Q. Tests for the High Range since January 1995. Across the tests, the median protonorms per age class are computed. In case of compound tests, the subtest scores are used instead of the total scores, because the "age taken" information resides at subtest level (different subtests may have been taken at different ages). A compound test is a test consisting of subtests that each have a statistical report of their own at the statistics page.

Apart from compound tests, also excluded are tests with strong floor or ceiling effects, as well as tests that do not have internal statistics (like "age taken") on record.

The results are presented within-sex to detect possible sex differences in the development of I.Q. with age. The tables contain, for each age class, the number of scores, the median protonorm, the corresponding I.Q., and a graphical representation wherein the number of *s is (I.Q. - 105) / 2.

If one is interested in the total averages (all age groups combined), it is better to consult the protonorm table and look for the medians (high-range proportion outscored .5, or whatever is closest to that).

Scores by age - within males

Age class n Median protonormI.Q.Graph
80 to 841254117******
75 to 791360133**************
70 to 7424386137****************
65 to 6961379136****************
60 to 6461387137****************
55 to 59121416142*******************
50 to 54208410141******************
45 to 49334400139*****************
40 to 44417425143*******************
35 to 39553415141******************
30 to 34562412141******************
25 to 29823398139*****************
22 to 24475408140******************
20 or 21283398139*****************
18 or 19255386137****************
17107386137****************
1657377135***************
1522374135***************
1415282121********
136314126***********
121276120********
91209111***

N = 4388

Scores by age - within females

Age class n Median protonormI.Q.Graph
75 to 791353132**************
70 to 745351131*************
60 to 642294123*********
55 to 592273120********
50 to 5450328128************
45 to 4917387137****************
40 to 4452392138*****************
35 to 3940394138*****************
30 to 3438386137****************
25 to 2928349131*************
22 to 2433320127***********
20 or 2114328128************
18 or 1915308125***********
176283121********
165281121********
157329128************
149281121********
132269119*******
122171105 

N = 328

The present amount of female data is not sufficient to make the development of scores with age significant.

Test used

  1. Test of the Beheaded Man
  2. Cartoons of Shock
  3. Cooijmans Intelligence Test - Form 3
  4. Qoymans Multiple-Choice #5
  5. A Paranoiac's Torture: Intelligence Test Utilizing Diabolic Exactitude
  6. Daedalus Test
  7. De Laatste Test
  8. The Final Test
  9. Female Intelligence Test
  10. GliaWeb Raadselachtige Associatie- en Analogietest
  11. Genius Association Test
  12. Laaglandse Aanlegtest - Herziening 2016
  13. Low Countries Aptitude Test
  14. Letters
  15. Lieshout International Mesospheric Intelligence Test
  16. De Golfstroomtest
  17. The Nemesis Test
  18. Numerical section of Test For Genius - Revision 2010
  19. De Golfstroomtest - Herziening 2019
  20. Psychometric Qrosswords
  21. Gliaweb Raadselachtig Analogieproefwerk
  22. Gliaweb Riddled Intelligence Test - Revision 2011
  23. Reason - Revision 2008
  24. The Sargasso Test
  25. Verbal section of Test For Genius - Revision 2004
  26. Spatial section of Test For Genius - Revision 2004
  27. The Test To End All Tests
  28. Words
  29. Verbal section of The Marathon Test
  30. Numerical section of The Marathon Test
  31. Spatial section of The Marathon Test
  32. Problems In Gentle Slopes of the first degree
  33. De Roskam
  34. Only idiots
  35. Reflections In Peroxide
  36. Problems In Gentle Slopes of the third degree
  37. Random Feickery (Brandon Feick)
  38. Qoymans Multiple-Choice #1
  39. Qoymans Multiple-Choice #2
  40. Qoymans Multiple-Choice #3 (batch scored by Paul Cooijmans)
  41. Test of Shock and Awe
  42. Spatial Insight Test
  43. Short Test For Genius
  44. Space, Time, and Hyperspace
  45. Verbal Insight Test
  46. Association and Analogies (German)
  47. Association and Analogies (French)
  48. A-10 - Early experimental association test in Netherlandic
  49. A-18 - Early experimental association test in Netherlandic
  50. Numbers
  51. Odds
  52. Numerical Insight Test
  53. Analogies of Long Test For Genius
  54. Analogies subtest of Long Test For Genius (Netherlandic)
  55. Analogies #1
  56. Analogies #1 (Netherlandic)
  57. Association subtest of Long Test For Genius
  58. Qoymans Multiple-Choice #4
  59. Association subtest of Long Test For Genius (Netherlandic)
  60. Reason
  61. The Gate
  62. Bonsai Test
  63. Cooijmans Intelligence Test - Form 1
  64. Cooijmans Intelligence Test - Form 2
  65. Giga Test
  66. Grail Test
  67. Analogies subtest of Long Test For Genius (French)
  68. Association subtest of Long Test For Genius (French)
  69. Problems In Gentle Slopes of the second degree
  70. The Final Test - Revision 2013
  71. Space, Time, and Hyperspace - Revision 2016
  72. Cooijmans Intelligence Test - Form 4
  73. The Alchemist Test (Anas El Husseini)
  74. Verbal section of Test For Genius - Revision 2016
  75. The Bonsai Test - Revision 2016
  76. Cooijmans Intelligence Test 5
  77. The Piper's Test
  78. Dicing with death
  79. De Laatste Test - Herziening 2019
  80. Gliaweb Riddled Intelligence Test (old version)
  81. Divine Psychometry (Matthew Scillitani)
  82. A Relaxing Test (David Miller)
  83. Qoymans Multiple-Choice #3 (batch scored by Jonathan Wai)
  84. Hoogst Aimabele Raadsel-Test
  85. The Smell Test
  86. Gliaweb Recycled Intelligence Test
  87. The Marathon Test - Revision 2024
  88. Test for Genius - Revision 2025

[More statistical reports]