This textbook consolidates main findings across disciplines about individuals' development during the middle years. Twelve chapters are organized into three parts. The first three chapters explore development from the perspective of a historical/cultural period and within the context of dynamic social change and looks at theories of identity and personality functioning in middle age: "Midlife Development in a Life Course Context" (Phyllis Moen, Elain Wethington); "The Development of Self in Midlife" (Susan Krauss Whitbourne, Loreen Angiullo Connolly); and "The Midlife Crisis Revisited" (Stanley D. Rosenberg, et al.). The next three chapters include issues of physical health: "Health and Disease in Midlife" (Susan S. Merrill, Lois M. Verbrugge); "Women's Health at Midlife" (Nancy E. Avis); and "Cardiovascular Health: A Challenge for Midlife" (Ilene C. Siegler). The last six chapters focus on psychological and social functioning, including subjective well-being, issues of autonomy and control, gender, cognitive development, and occupational functioning: "Psychological Well-Being in Midlife" (Corey Lee M. Keyes, Carol D. Ryff); "The Sense of Control in Midlife" (Margaret Clark-Plaskie, Margie E. Lachman); "Gender Roles and Gender Identity in Midlife" (Margaret Hellie Huyck); "Intellectual Functioning in Midlife" (Sherry L. Willis, K. Warner Schaie); "A Life-Span Framework for Assessing the Impact of Work on White-Collar Workers" (Bruce J. Avolio, John J. Sosik); and "Middle Age: New Thoughts, New Directions" (James D. Reid, Sherry L. Willis). Author and subject indexes are appended. (YLB)