. Author manuscript; available in PMC: 2010 Jul 2.

Published in final edited form as: Psychol Aging. 2010 Jun;25(2):356–368. doi: 10.1037/a0017625

Table 3. Participant Characteristics by Age Group: Experiment 2.

	M		SD

	Younger	Older	Younger	Older
Age (years)	20.25_a	68.29_b	2.31	5.22
Education	13.79_a	16.88_b	1.59	2.47
Vocabulary	63.04_a	63.83_a	4.48	3.53
Digit Symbol Acc	97.89_a	97.77_a	1.44	2.59
Digit Symbol RT	1320.75_a	1820.40_b	212.83	338.85

Note. n = 24 per age group. Vocabulary = raw score (maximum of 70) on the Wechsler Adult Intelligence Scale-Revised (Wechsler, 1981); Digit Symbol Acc and Digit Symbol RT = percentage correct and reaction time (ms), respectively, on a computer test of digit-symbol coding (Salthouse, 1992a). Means in the same row that do not share subscripts differ by t-test at p < .05.