Table 1.

Brief Description of Cognitive Tests

Test	Description	Source
Vocabulary	Provide the definition of words read by the examiner	Wechsler (1997a)
Picture vocabulary	Name pictured objects	Woodcock & Johnson (1990)
Synonym vocabulary	Select the best synonym of the target word	Salthouse (1993)
Antonym vocabulary	Select the best antonym of the target word	Salthouse (1993)
Matrix reasoning	Select the best completion of the missing cell in a matrix of geometric patterns	Raven (1962)
Shipley abstraction	Select the best continuation of a series of items	Zachary (1986)
Letter sets	Select the set of letters that does not belong with the others	Ekstrom, French, Harman, & Dermen (1976)
Spatial relations	Determine which three-dimensional object matches the two-dimensional drawing	Bennett, Seashore, & Wesman (1997)
Paper folding	Determine which pattern of holes would result from the paper being folded and a  hole being punched in the designated location	Ekstrom et al. (1976)
Form boards	Determine which pieces are needed to assemble a target shape	Ekstrom et al. (1976)
Word recall	Listen to 12 unrelated words, recall as many as possible in any order, and repeat  for four trials	Wechsler (1997b)
Logical memory	Listen to a story and recall as much as possible	Wechsler (1997b)
Paired associates	Listen to 6 pairs of unrelated words and recall the second member of the pair when  presented with the first	Salthouse, Fristoe, & Rhee (1996)
Digit symbol	Use a code table to substitute as many symbols for digits as possible within 120 s	Wechsler (1997a)
Letter comparison	Classify sets of letters as same or different as rapidly as possible	Salthouse & Babcock (1991)
Pattern comparison	Classify sets of line patterns as same or different as rapidly as possible	Salthouse & Babcock (1991)