National identity and national pride are concepts that deal with the attitudes of people at the most abstract level toward their nation and the state. An important measure of political attitudes is "political efficacy". Political efficacy is the self-perceived capacity to understand politics, to express demands and effect positive political change. Political efficacy may be distinguished from personal efficacy, which refers to the individual's confidence to deal with family, friends, peers, and supervisors at work. To some observers, trust has been a hallmark of the British. There are important qualifications, however, to this picture of social trust. In 1989, 64 percent of British respondents felt that "most people with power try to take advantage of people like yourself". Though political trust in Britain may have been low for a long period of time, evidence does point to some erosion of levels of trust.