New research sheds light on the role of friendship ties in social influence, highlighting the importance of considering reciprocity and directionality when designing interventions for collective action. The study reveals that poor perception of friendship ties can limit the predictability of tie direction and reciprocity, underscoring the need to account for these factors in field settings. Source: https://journals.plos.org/plosone/article?id=10.1371/journal.pone.0151588