Outline what IQ is, and discuss the assumption of normal distribution of intelligence.

Aims and objectives
After studying this chapter you should be able to:
. Describe Alfred Binet’s early attempt to measure intelligence
. Identify some of the main features of an intelligence test, and the principles behind test design.
. Outline what IQ is, and discuss the assumption of normal distribution of intelligence.
. Appreciate the complex nature of intelligence and the challenges posed by attempting to measure aspects of human psychology that cannot be directly observed.