Key points are not available for this paper at this time.
Adult Development and Aging Adult Development and Aging, by M. Perlmutter & E. Hall. John Wiley and Sons, New York. 1985, 602 pp. , 27. 95 (hardcover). Journal of Gerontology, Volume 41, Issue 2, March 1986, Page 296, https: //doi. org/10. 1093/geronj/41. 2. 296a Published: 01 March 1986
Schaie et al. (1986) studied this question.