Once incorporated into public life, women appear to prefer modes of political participation that differ from those preferred by men. Evidence suggests that women are more attracted to local politics, private activism, and voting; they also prefer inclusive institutions and small groups. Meanwhile, men are relatively more involved in collective actions and political parties. Previous studies have suggested several reasons but have not attempted to isolate which characteristics make some forms of action more attractive. Is it the time required to participate, the organizers, the level of government addressed, the existence of conflict, or the privacy of the action that makes the difference? To understand gendered preferences in forms of political action, we employed a choice-based conjoint experimental design where respondents were asked to make a forced choice between two hypothetical forms of action to react to a political decision they disagree with. The survey experiment was embedded in a large sample of the Spanish population in July 2023. In this paper, we present the results of this novel approach to studying gender gaps in political involvement