The project PVBPA – “Portuguese Voting Behaviour and Political Attitudes” – ran from 2001 to 2005. Its main objective was to encourage the study of Portuguese voting behaviour and political attitudes from comparative and longitudinal perspectives. This was achieved in two phases with two distinct aims: a) the creation of a collection of studies and opinion polls on Portuguese voting behaviour and political attitudes that allow longitudinal studies to be carried out; and b) the realisation of a post-legislative election survey – the first national electoral study conducted in Portugal.

The fulfilment of these two goals was marked with the publication of two analytical books (one on voting behaviour during the past 30 years and the other on the 2002 legislative elections) and two booklets containing databases (one with data retrieved by the project, and the other with data resulting from the 2002 survey).
The announcement at the end of 2004 that there would be early elections enabled the project to conduct a second electoral survey immediately after the 2005 elections. By carrying out this survey, which had not been programmed, the project would be able to enrich its collection of political studies and begin its activities as a member of the Comparative National Elections Project (CNEP).