104 chapter 4 predicts unique variance in community-based adaptation intentions when controlling for individual transilience (H3). Study 2 included an experimental manipulation aiming to strengthen collective transilience, to test whether this would in turn promote community-based adaptation intentions. We hypothesised that emphasising that climate change poses risks to the community of Stadshagen (e.g., ‘Climate change poses a risk to us, residents of Stadshagen’) would lead to higher levels of collective transilience, compared to emphasising the risks posed by climate change only to the individual (e.g. ‘Climate change poses a risk to you and your household’). This hypothesis was based on research showing that when people are reminded that they are facing a certain threat as a group (i.e. they perceive common fate, that it is “us” against the threat; Drury, 2018), they are more likely to show collective resilience and to engage in actions that serve the interests of the group (as opposed to individual interests; Drury, 2018; Drury et al., 2019; Ntontis et al., 2020). Yet, we found no difference between the two conditions, neither in collective transilience (F(1, 288) = 0.11; p = .740), nor in any of the communitybased or individual adaptation intentions (see Appendix A). Therefore, we conducted the analyses without considering these conditions as separate groups. Method Participants and Procedure Data was collected in collaboration with the municipality of Zwolle among inhabitants of Stadshagen, thus among members of the community that could join the SensHagen initiative. Via a panel of residents in Stadshagen, a total of 1250 residents were invited to fill in an online survey, of which 456 consented to participate and filled in our questionnaire (response rate = 36.5%) at least partially. Participants were not yet members of the SensHagen initiative, and were unlikely to know about it, although we did not formally verify this. From the initial sample, 158 participants were removed as they did not fill in the collective and/or the individual transilience scale. The final sample consisted of 298 participants (59% identified as men; Mage = 49.40; SDage = 13.30; see more demographic information in Supplementary Material). A post-hoc power analysis (G*Power; Faul et al., 2007) showed that we had a power of .95 to determine a medium effect (i.e., r = .30 for correlations, f2 = .15 for a multiple regression), thus we had enough participants to test our hypotheses. After consenting, participants read a short text on the climate change risks and the need for climate change adaptation in StadsHagen (i.e., the experimental manipulation, which was not effective, as explained above), followed by a short description of the SensHagen initiative (see full text in Appendix A). Participants then completed questions about the SensHagen initiative, adaptation intentions, and individual and
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