This volume is the fourth in a series designed to facilitate inter-disciplinary communication between scientists concerned with the description of societal phenomena and those investigating adult development. As such, it contains a compilation of papers presented at an annual conference held at the Pennsylvania State University. These essays by sociologists and epidemiologists deal with the impact of disease and health outcomes with advancing age and are critiqued by members of related disciplines. In addition, there are overviews as well as specific discussions about the impact of cancer, depression, and cardiovascular diseases upon psychosocial functions.