individual members and how individuals within the group conceive ethnic boundaries. As a non-directive and flexible analytical tool, the concept of boundaries helps both to map and to define the changeability and mutability that are characteristic of people's experiences of the self in society. While identity is a volatile, flexible and abstract 'thing', its manifestations and the ways in which it is exercised are often open to view. Identity is made evident through the use of markers such as language, dress, behaviour and choice of space, whose effect depends on their recognition by other social beings. Markers help to create the boundaries that define similarities or differences between the marker wearer and the marker perceivers, their effectiveness depends on a shared understanding of their meaning. In a social context, misunderstandings can arise due to a misinterpretation of the significance of specific markers. Equally, an individual can use markers of identity to exert influence on other people without necessarily fulfilling all the criteria that an external observer might typically associate with such an abstract identity. Boundaries can be inclusive or exclusive depending on how they are perceived by other people. An exclusive boundary arises, for example, when a person adopts a marker that imposes restrictions on the behaviour of others. An inclusive boundary is created, by contrast, by the use of a marker with which other people are ready and able to associate. At the same time, however, an inclusive boundary will also impose restrictions on the people it has included by limiting their inclusion within other boundaries. An example of this is the use of a particular language by a newcomer in a room full of people speaking various languages. Some people may understand the language used by this person while others may not. Those who do not understand it might take the newcomer's use of this particular language merely as a neutral sign of identity. But they might also perceive it as imposing an exclusive boundary that is meant to mark them off from the person. On the other hand, those who do understand the newcomer's language could take it as an inclusive boundary, through which the newcomer associates themself with them to the exclusion of the other people present. Equally, however, it is possible that people who do understand the newcomer but who also speak another language may not want to speak the newcomer's language and so see