Psychologist James McKeen Cattell

Infant intelligence test.

The Cattell Infant Intelligence Scale is one of the oldest infant intelligence tests, originally designed in 1950. The Cattell scale measures mental development from 3-30 months, evaluating motor control and verbalizations. Items at each level cover the preceding period of development. Motor control is assessed by a series of tasks that involve manipulating various objects, such as cubes, pencils, and pegboards. Sample items from the test (with age norms on the Cattell scale) are: lifting a cup (6 months), ringing a bell (9 months), putting a cube in a cup (11 months), and marking with a crayon (12 months). The examiner also takes notes on the infant's attempts to communicate. The test is untimed but usually takes 20-30 minutes. Results are reported in terms of mental age and IQ score. The Cattell scale—which has been modified based on research...