Comparing solidarity attitudes of European citizen is highly relevant in the context of European integration and unification. Such comparisons, however, are only valid if responses to attitude questions reflect true differences in solidarity and, hence, the measurement of latent solidarity...

It is generally accepted that both measurement inequivalence and extreme response bias can seriously distort measurement of attitudes and subsequent causal models. However, these two issues have rarely been investigated together. In this article we demonstrate the flexibility of a multigroup...