Table 1.

Characteristics of the Five Age Groups Depicted in Figure 4.

Group	Age Range	N	Age	Education	Vocabulary
1	20–31	75	24.9 (3.8)	15.7 (1.7)	13.4 (2.6)
2	32–46	77	38.1 (4.2)	15.7 (2.0)	11.6 (2.6)
3	47–61	79	53.6 (4.4)	15.5 (2.2)	12.3 (2.6)
4	62–75	80	68.5 (3.8)	15.4 (2.7)	12.3 (2.4)
5	76–89	77	81.4 (3.4)	14.9 (2.5)	12.8 (2.5)

Note. Age = Mean age in years; Education = Mean number of grades completed; Vocabulary = Mean of WAIS-III scaled scores based on age norms; Standard Deviations provided in parentheses for Age, Education and Vocabulary.