Factor analysis of social and abstract intelligence.

ROBERT L. THORNDIKE George Washington UniversityIt was suggested by E. L. Thorndike some twenty years ago that there might be three main types of intelligence—abstract, mechanical, and social. Since that time a great number of tests have been developed to measure abstract intelligence, and smaller numbers to measure mechanical intelligence and social intelligence. One of the better known of the tests purporting to measure social intelligence is the George Washington Social Intelligence Test. This test has been criticized because of its low correlation with other tests which were