Background Information
Binet defined intelligence as the capacity (1) to find and maintain a definite direction or purpose, (2) to make necessary adaptations-that is strategy adjustments -to achieve that purpose, and (3) for self-criticism so that necessary adjustments in strategy can be made.
Binet's two principles of test construction were age differentiation and general mental ability. Age differentiation refers to the fact that with increasing age, children develop their abilities. Thus, older children have greater abilities that do younger ones. …
