Reference task	Description
Wechsler Adult Intelligence Scale Vocabulary (Wechsler, 1997a)	Provide definitions of words
Picture Vocabulary (Woodcock & Johnson, 1990)	Name the pictured object
Antonym Vocabulary (Salthouse, 1993)	Select the best antonym of the target word
Synonym Vocabulary (Salthouse, 1993)	Select the best synonym of the target word
Matrix Reasoning (Raven, 1962)	Determine which pattern best completes the missing cell in a matrix
Shipley Abstraction (Zachary, 1986)	Determine the words or numbers that are the best continuation of a sequence
Letter Sets (Ekstrom et al., 1976)	Identify which of five groups of letters is different from the others
Spatial Relations (Bennett et al., 1997)	Determine the correspondence between a 3-D figure and alternative 2-D figures
Paper Folding (Ekstrom et al., 1976)	Determine the pattern of holes that would result from a sequence of folds and a punch through folded paper
Form Boards (Ekstrom et al., 1976)	Determine which combinations of shapes are needed to fill a larger shape
Logical Memory (Wechsler, 1997b)	Number of idea units recalled across three stories
Paired Associates (Salthouse et al., 1996)	Number of response terms recalled when presented with a stimulus term
Digit Symbol (Wechsler, 1997a)	Use a code table to write the correct symbol below each digit
Letter Comparison (Salthouse & Babcock, 1991)	Same–different comparison of pairs of letter strings
Pattern Comparison (Salthouse & Babcock, 1991)	Same–different comparison of pairs of line patterns