Table 1. Means and Standard Deviations for Participant Characteristics.

	Young Adults (Ages 18-29)	Older Adults (Ages 60-79)	Very Old Adults (Ages 80-95)
Age	22.0 (3.2)	69.6 (5.9)	83.2 (4.1)
Education	14.8 (2.4)	15.2 (2.7)	14.6 (2.4)
IQ	115.4 (10.9)	117.0 (12.3)	118.5 (13.4)
Vocabulary	63.3 (6.9)	63.7 (7.8)	61.0 (5.8)
Matrix Reasoning **	29.7 (3.07)	24.1 (5.2)	20.2 (7.3)
Ravens Advanced Progressive Matrices**	33.0 (8.4)	19.9 (8.4)	13.1 (8.2)
Traditional Operation Span **	10.5 (2.8)	7.6 (2.5)	6.6 (2.2)

^**Matrix Reasoning, Ravens Advanced Progressive Matrices, and Operation Span scores were significantly different between the older and younger adults (p < .01), and were negatively correlated with age between ages 60-95. There were no other significant age differences.