Abstract
Political trust is a key component of civic investment in democratic societies. However, the reasons for its fluctuations within the democratic process remain insufficiently understood. This study investigated longitudinal associations between electoral outcome, political collective action, and political trust. We hypothesized that collective action would moderate the impact of election results, such that trust would increase among engaged individuals whose preferred party won, but decrease among those whose preferred party lost. Using longitudinal data collected before and after the 2024 UK General Election (N = 543), we found a general increase in political trust following the election. This increase was weaker, although still significant, among participants who supported losing parties. Furthermore, we observed an interaction between collective action and local electoral outcome: Political trust increased for all participants except those who had greatly invested in collective action and whose local candidate had not been elected as Member of Parliament. These findings confirm that electoral processes foster political trust, but also suggest that unsuccessful collective action may hinder the typical increase in political trust following an election. They highlight the importance of both institutionalized and non-institutionalized political engagement in shaping trust, with implications for understanding how democratic participation can strengthen—or undermine—support for the political system.Key Takeaways
- Democratic elections tend to lift political trust overall, but winners gain more. In the UK 2024 General Election, trust rose more among national “winners” (Labour voters; b = 0.42, β = .34, p < .001) than among “losers” (b = 0.13, β = .10, p < .001). Before the vote, groups did not differ statistically significantly (b = 0.10, β = .08, p = .366), but after the vote winners reported higher trust (b = 0.40, β = .32, p < .001).
- Local results matter for how people feel the system works. Trust increased more when one’s preferred local MP candidate won (b = 0.33, β = .27, p < .001) versus lost (b = 0.13, β = .11, p = .002), and a significant three-way interaction showed that people who had invested in collective action did not experience a post‑election trust boost if their local candidate lost. This moderation was sensitive to how engagement was measured, disappearing with a simple yes/no measure (p = .178) but nearly persisting using a Rasch score (p = .052).
- The amount of collective action engagement shapes trust—especially for those who lose. Among non‑Labour voters, more pre‑election collective action predicted lower political trust overall (b = −0.14, ꞵ = -.11, p = .025), whereas among Labour voters the association was nonsignificant (b = 0.10, ꞵ = .08, p = .235). Nationally, the expected three‑way moderation was not detected, suggesting that engagement mainly amplifies the psychological cost of defeat in more proximal, local contests.

















