Abstract: | The absence of studies investigating the influence of political participation on individuals’ perceptions of political efficacy constitutes a significant gap in our knowledge of political behaviour. While many researchers have investigated the influence of efficacy on political participation, and there has been some endeavour to examine the reciprocity of the relationship between the variables, none has estimated a comprehensive model of the impact of individuals’ participation is different kinds of political activity on different aspects of their perceptions of political efficacy. We redress these particular deficiencies in our knowledge of political behaviour, investigating the influence of participation in three different modes of activity—partisan activism, community activism and political extremism—on individuals’ perceptions of internal and external efficacy; that is, their perceptions of political self‐competence and system responsiveness. Our findings confirm that the relationships between different modes of participation and efficacy are both reciprocal and varied, and that they vary in ways which have important implications for theories of participatory democracy. |