The English school made a great leap forward with Spearman's invention of factor analysis. Using this technique Spearman found that all tests of intelligence are positively correlated (this is what it means to have a general factor, also called a positive manifold). However, Thurstone later disputed the prominence assigned to general intelligence by rotating the factors. In this way he found several primary mental abilities, instead of the one found by Spearman.
|PROPONENTS OF ONE GENERAL INTELLIGENCE||PROPONENTS OF MULTIPLE INTELLIGENCES|
Activity: The readings covered in detail the question of one versus many intelligences. Do you believe there is one intelligence or that there are many? How would you support your conclusions?
Activity: Intelligence testing has generated a great deal of controversy. Do you agree with or oppose the idea that people can be rated on a unilinear scale of general intelligence?