ABSTRACT
This chapter seeks to understand the revolutionaries, elderly people in modern society. It considers few areas of cognitive development, personality, depression and dementia, and widowhood. In order to understand the ageing process, it is necessary to use a multidisciplinary framework that includes various influences on development. Biopsychosocial model highlights the fact that ageing is not the result of any one of these influences alone; rather, all three must be considered together. Biological and physical factors represent degenerative influences of chronic illness, functional incapacities, and physical diseases. These disease factors play a very important role in understanding ageing, as many of them are associated with negative images of ageing. The information-processing model has been adopted by researchers in cognitive ageing as a general framework in which to study how people deal with incoming stimuli and how these processes change over time. The large research literature on age differences in memory have helped establish guidelines for distinguishing between normal and abnormal ageing.
