One way to obtain information on specific kinds of abilities, rather than a single mental-age score, is to separate the items into more than one group and to score the groups separately. The Wechsier Adult Intelligence Scale and the Wechsier Intelligence Scale for Children use items similar to those in the Binet tests, but they divide the total test into two parts-a verbal scale and a performance scale-according to the content of the items. A performance item is one that requires manipulation or arrangement of blocks, beads, pictures, or other materials in which both stimuli and responses are nonverbal. The separate scaling of the items within one test is convenient for diagnostic purposes.