This study investigates the influence of sociodemographic variables (gender, age and schooling), family income, political attitudes (civic engagement and party preference) and the use of digital social media platforms on the online and offline political participation of voters of Salvador (in the state of Bahia, Brazil) during the 2014 presidential elections. The results of multinomial statistical analysis proved that social media engagement was determinant for online and offline political participation. On the other hand, a higher education was decisive for web participation. Multivariate analyses also confirmed the Reinforcement Hypothesis (DI GENNARO; DUTTON, 2006;NORRIS, 2001), evidencing that the most engaged voters in conventional participation used digital technologies to reinforce their participatory activity. The data of this study was obtained through household survey conducted in January 2015 in Salvador to investigate the use of Information and Communication Technologies (ICTs) in the electoral decision-making process.