Recent research shows that the belief that the world is fair to the self (BJW-self) is associated with indices of psychological health, whereas the belief that the world is fair to others (BJW-others) is associated with harsh social attitudes (Begue and Bastounis, 2003). However research has not ruled out the possibility that third factors are responsible for these patterns of correlation. In the present research, 233 psychology undergraduates completed measures of BJW-self, BJW-others, attitudes to the poor, life satisfaction, locus of control, self esteem, and socially desirable responding. Results showed that BJW-self is uniquely related to psychological health, BJW-others is uniquely related to harsh attitudes to the poor, and that these relationships are not attributable to the influence of third causes. Results provide strong support for the distinction between perceived justice for the self and for others, and suggest that perceptions of justice are indeed the "active ingredient" responsible for their ability to predict psychological and social outcomes. (c) 2005 Elsevier Ltd. All rights reserved.