100 chapter 4 collective transilience is associated with more community-based adaptation intentions and behaviours and higher support for local adaptation policies (Hypothesis 1). We also explored the relationship between collective transilience and individual adaptation behaviours and intentions, such as checking weather forecasts. Study 2 was conducted in the neighbourhood of Stadshagen, in Zwolle, The Netherlands, where a community initiative was launched to encourage residents to make their neighbourhood more climate adaptive. As in Study 1, we examined whether people perceive collective transilience. Next, we examined whether people intend to engage in community-based adaptation behaviours, and whether higher collective transilience is associated with stronger community-based adaptation intentions, including interest to join the community initiative (Hypothesis 1). Additionally, we examined whether collective transilience, compared to individual transilience, is more strongly related to community-based adaptation intentions and less strongly related to individual adaptation intentions (Hypothesis 2). Finally, we examined whether collective transilience is uniquely related to community-based adaptation intentions when individual transilience is controlled for (Hypothesis 3). Both studies were approved by the Ethical Committee of Psychology of the University of Groningen. 4.2. STUDY 1 Method Participants and Procedure We recruited participants from the US population via Amazon MTurk (a crowdsourcing platform), a convenient sample to initially test our hypotheses. To ensure good quality of the data, only participants with a high reputation were allowed to participate in our study (i.e., > 90% approval rate; Peer et al., 2014). Participants were randomly assigned to the present study or a parallel study on individual transilience; 197 participants consented for the present study, and received 1 USD compensation. We removed one duplicated IP address and one participant who failed the attention check question (where we asked participants to select the option ‘6’ on a 7-point scale). We excluded 10 participants who completed the survey within 2.5 minutes, as it was unrealistic to accurately fill in the questionnaire in such a short time (median completion time = 6.2 minutes). Thus, 185 responses were retained for analyses (60.5 % identified as men; Mage = 36.6; SDage = 10.9; detailed demographics provided in the Supplementary Material). A post-hoc power calculation (G*Power; Faul et al., 2007) showed that we had a power of .90 to detect a small-to-medium effect for correlations (r = .20) with this sample.
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