Two-wave longitudinal findings from the Berlin Aging Study: Introduction to a collection of articles

The Berlin Aging Study (BASE) was established in 1989 to investigate questions about the young-old and oldest old adults from the joint and collaborative perspectives of 4 disciplines: psychiatry, psychology, sociology, and internal medicine. This paper provides background information for a collection of articles that describe 2-wave longitudinal findings derived from the 1st intensive follow-up of participants of BASE. Multidisciplinary data were collected during 1995-1996 from 206 survivors approximately 4 yrs after baseline assessment (1990-1993). The strengths of the initial BASE design, in terms of a focus on very old age, multidisciplinary intensive assessment, and an examination of selectivity issues, were maintained in this longitudinal extension of the study. (PsycINFO Database Record (c) 2007 APA, all rights reserved)