- Gifted women (IQ >135), followed 50 years, California, USA, 1921-72
- N = 671
- Non Response:
- Attrition in 1972: 25%
Repeated interviews and questionaires
- Authors's label
- Exact ability
- Our Classification
- a.Teachers comparison with average in arithmetic.
b.Teacher rates math as best(vs worst) subject.
c.Parent report on special ability in math.
d.Arithmic quotient on Stanford Achievement Test.
Assessed in 1922.