Furthermore, it is shown that at approximately 190 IQ (S-B) individuals "go through the ceiling" of available tests for adult intelligence by the time they are 21 years old. We cannot at present distribute these persons at maturity.
Perhaps this is the point at which the term "genius" begins to apply—i.e., at or near IQ 180 (S-B)—if we adhere to the dictionary definition of the word, "Exalted intellectual power, marked by an extraordinary faculty for original creation, expression, or achievement" which is beyond the reach of available modes of measurement in its maturity.
APPLICATION OF BERNREUTER INVENTORY OF PERSONALITY TO HIGHLY INTELLIGENT ADOLESCENTS [4]
The data of the present study were obtained early in 1933, the subjects being 36 boys and 19 girls, of the average age of 18 years 6 months. The IQ's (S-B) of all had been taken in early childhood. The group ranged from 135-190 IQ (S-B) with a median at about 153 IQ (S-B). All but four of these young persons were Jewish, a factor which must be considered as of possible consequence, but which cannot be evaluated properly from any data at present in scientific literature.
The inventories were taken and scored by the investigators in person. All subjects had been personally known since childhood to the senior investigator.
The method of scoring follows Bernreuter, three categories only being found of sufficient independence to warrant recording.
SHOWS GROUP RESULTS FOR HIGHLY INTELLIGENT BOYS AND GIRLS, GIVING EVIDENCE THAT SUCH GROUPS ARE MUCH LESS NEUROTIC, MUCH MORE SELF-SUFFICIENT, AND MUCH LESS SUBMISSIVE IN ATTITUDE THAN COLLEGE STUDENTS OR ADULTS IN GENERAL ARE, ACCORDING TO THE CATEGORIES AND NORMS SET UP BY BERNREUTER
B1-N NEUROTIC TENDENCY B1-S SELF-SUFFICIENCY B1-D DOMINANCE-SUBMISSION
Statistical Highly College Adult Highly College Adult Highly College Adult
categories intelligent norm norm intelligent norm norm intelligent norm norm
boys group group boys group group boys group group
Number 36 427 86 36 427 99 36 427 100
Mean -104.9 -52.9 -69.3 54.5 24.9 38.8 87.4 46.3 52.7
σ 56.7 85.2 76.3 42.3 54.0 52.4 44.6 67.4 61.8
σ Mean 9.4 4.1 8.2 7.0 2.6 5.3 7.4 3.3 6.2
σσ 6.7 2.9 5.8 5.0 1.8 3.7 5.2 2.3 4.4
σ diff. ms. 10.2 12.5 7.5 8.8 8.1 9.6
D
———
σ diff. 5.1 2.8 3.9 2.1 5.1 3.6
Median -112.0 -70.0 -75.0 54.5 25.0 35.0 98.1 45.0 55.0
Girls Girls Girls