See Wechsler Adult Intelligence Scale, Third Edition.

Weber’s Law

The amount of change necessary to detect a different in a stimuli must be staged in a percentage since recognition of the change is relative to the characteristics of the initial stimulus (e.g., a one pound change in the weight of a pencil would be more easily recognized than a one pound weight added to a 300 pound barbell because it represents a much greater percentage of the total weight).

Wechsler Adult Intelligence Scale, Third Edition

An objective measure of intelligence. The Stanford-Binet test is also used, has very similar validity, but is not as popular.

Wernicke’s Aphasia

Aphasia resulting from damage to the Wernicke’s area of the frontal lobe. Affects written and spoken language.