In 2007, the two most important Italian left-wing parties merged into a single political entity.
This study intends to analyze the merging process. Specifically, and in line with the ingroup
projection hypothesis (Mummendey & Wenzel, 1999), we have explored whether the
identification and the favouritism toward the upcoming common group was affected by the
perceivers’ projection of specific and common stereotypical traits from the subordinate
groups to the superordinate one. Political militants’ (N =132) levels of ingroup identification,
their representations of the previous ingroup, outgroup and of the new party, their attitudes
towards the common group were assessed. Results confirmed that the cognitive representation
of the merged party was shaped much more on the basis of the typical traits of the ingroup
than of the outgroup. Moreover, Structural Equation Analyses showed that the identification
with the superordinate category and the consequent favouritism toward the merger were
related to the projection of ingroup attributes. The findings also suggested that the ingroup
projection may be particularly crucial when the intergroup bias is high. Finally, political
implications are discussed in terms of obstacles and resources inherent to the merging
process.
