Quote of the day
If we would build on a sure foundation in friendship, we must love friends for their sake rather than for our own.
Louis Leon Thurstone

Born: May 29, 1887
Died: September 30, 1955 (aged 68)
Bio: Louis Leon Thurstone was a U.S. pioneer in the fields of psychometrics and psychophysics. He conceived the approach to measurement known as the law of comparative judgment, and is well known for his contributions to factor analysis.
Known for:
- The nature of intelligence (1924)
- Primary Mental Abilities (1938)