Age can be defined in different ways. Before defining this process, it is important to consider that there are four approaches to this culturally significant phenomenon. The simplest of these is chronological age, which is the number of years a person is. Your biological age is measured against the change your body physically experiences and its deterioration in function. The third way to define age is psychologically. This can be anything from a change in your perception and sense processes, to how effectively your brain can absorb and understand information. Furthermore, your ability to adapt to different circumstances and your own personality may reflect your physiological age. Finally, the approach that most helps the study of the sociology of aging is approaching the definition of age from a sociological approach. The sociological age of an individual is defined by the social expectations of older people. (Openstax College 2012) There is growing interest in aging from both sociologists and social policy researchers, which has been significantly stimulated by a new awareness of the increasing age dependency ratio (i.e. the expected costs associated with this through pensions and healthcare), changing consumption patterns and the "vertical" growth of families. In a large number of societies there have been very different responses to population ageing. These will be discussed later, but it is important to highlight the importance of these ideas about intergenerational relationships shared between nations. Although aging itself is considered a biological process, a definition of "old" or "young" and how to segment people by age varies by culture. In Western societies, youth has great value... at the center of the paper......es, where the lived experience of aging has been discussed from a predominantly discriminatory point of view, must be and is considered very useful in modern societies societies. It is also important, however, to consider not only the hostile approach to aging, but also the cases in which prejudice may be more benevolent. In the case of seniors, for example, there are those who can offer them preferential treatment, including cheaper visits to the cinema or bus passes (these types of discounts can also be applied to young people of course). Conversely, perceptions of incompetence may lead one to conclude that people on both sides of the adult are unfairly dismissed when considering a task to complete. In some cases there is little or too much evidence to support these claims. This can lead to concerns on the part of any individual that, when they reach the final years of their life, they will be needed?