**Study 2 Procedure** After consent, participants take measures of implicit and explicit identification with environmentalists, followed by measures of environmental behaviors, concern, and policy support. Then, they are debriefed. **Study 2 Materials (For a demonstration, click this [link][1])** The materials presented here are shown in the order they are shown in the study. The two exceptions are Environmentalist Identifation and Inclusion of Self in Other scales, which are presented in counterbalanced order. *Single-Target Implicit Association Test (ST-IAT):* We adapted Bluemke and Friese's (2007) ST-IAT procedure for the current study. The procedure was the same as Study 1's except for two differences. First, Blocks 2-5 were 96 trials instead of 48 trials long. Second, blocks are presented in a sequential order rather than alternating order. That means participants took two of the same block in a row followed by two of the other block in a row (instead of taking one block, then the other, in alternating order). Full description below: This adapted ST-IAT consisted of five blocks (20 trials in the first block, 96 trials in other blocks). Participants in the first block sorted words belonging to one of two categories (Self and Other) by pressing either "E" (for Other) or "I" for (for Self). In the second and third blocks, participants sorted words belonging to one of three categories (Self, Other, and Environmentalist) by pressing either "E" (for Other) or "I" for (for Self or Environmentalist). In the fourth and fifth blocks, participants did the same except Environmentalist words are also categorized with Other-related words instead of Self-related words. Each block had 40 trials for the attribute that Environmentalist is not paired with, 28 trials for Environmentalist, and 28 trials for the attribute that Environmentalist is paired with. There was no response deadline, no feedback for correct responses, and participants were required to correct incorrect responses. Participants were randomly assigned to take the ST-IAT in the order above or in a flipped order where Other/Environmentalist vs. Self are Blocks 2 and 3 and Other vs. Self/Environmentalist are Blocks 4 and 5. The ST-IAT will be scored with the IAT D2 algorithm (Greenwald et al., 2003). The stimuli for each category are below: Environmentalist: Environmentalist, Conservationist, Preservationist, Tree-Hugger Self: Mine, Myself, Self, I, My Other: They, Their, Them, Theirs, Other *Environmentalist identification,* 1 (Disagree strongly) to 7 (Agree strongly). Adapted from Smith et al. (2007). 1. I see myself as an environmentalist. 2. I am pleased to be an environmentalist 3. I feel strong ties with environmentalists 4. I identity with other environmentalists. *Inclusion of Self In Others.* Adapted from Schultz 2001. See demonstration for pictures. (7 options) 1. Please choose the picture that best describes your relationship with the natural environment. How interconnected are you with nature? Enter the number below. 2. Please choose the picture that best describes you in relation to environmentalists. Enter the number below. *Policy opinion*. 1 (Disagree strongly) to 7 (Agree strongly). 1. The United States should create more laws to reduce global warming. 2. The United States should create a carbon pollution tax in order to reduce global warming. 3. The United States should support international efforts to reduce global warming. *Environmental behaviors*. "In the last six months, how often, if at all, have you engaged in the following environmental activities and actions?” (1 - Never, 2, 3 - Sometimes, 4, 5 - Frequently) 1. Participated in nature conservation efforts (e.g., planting trees, restoration of waterways). 2. Spent time working with a group/organization that deals with the connection of the environment to other societal issues such as justice or poverty. 3. Became involved with an environmental group or political party (e.g., volunteer, summer job, etc.). 4. Participated in a community event which focused on environmental awareness. 5. Consciously made time to be able to work on environmental issues (e.g., working part time to allow time for environmental pursuits, working in an environmental job, or choosing environmental activities over other leisure activities). *Contact with environmentalists*. 1. How many friends can you think of that would identify as environmentalists? 2. How many family members can you think of that would identify as environmentalists? 3. How many co-workers can you think of that would identify as environmentalists? (If the answer to any of these is greater than 0) 1. How often do you spend time with these friend(s)? 2. How often do you spend time with these family member(s)? 3. How often do you spend time with these co-worker(s)? *Nature experiences*. Response options -- Questions 1-3: 0, 1-2 times, 3-4 times, 5-6 times, 7-8 times, 9 times or more Question 4: Never, 1 day - two weeks, Less than 4 weeks, Less than 6 weeks, Less than 8 weeks, Less than 10 weeks, 10 weeks or more Questions 5 & 6: (Free entry, 0 - 18 years) 1. Before you turned 18, how many times did you go to aquariums? 2. "Before you turned 18, how many times did you go to zoos? 3. Before you turned 18, how many times did you go to natural history museums? 4. Before you turned 18, how much time did you spend at a summer camp or other group organization in nature (outside of a city)? 5. Of the 18 years of your childhood, how many years did you live in a house with a pet? 6. Of the 18 years of your childhood, for how many years were you primarily responsible for feeding a pet? *Social/Economic Ideology.* Strongly conservative to Strongly liberal (7 options) 1. In general, how liberal or conservative are you on social issues? 2. In general, how liberal or conservative are you on economic issues? *County of residence.*"Which of the following descriptions best describe your county of primary residence?" 1. County in metropolitan area of 1 million population or more 2. County in metropolitan area of 250,000 to 1 million population 3. County in metropolitan area of fewer than 250,000 population 4. Urban population of 20,000 or more, adjacent to a metro area 5. Urban population of 20,000 or more, not adjacent to a metro area 6. Urban population of 2,500-19,999, adjacent to a metro area 7. Urban population of 2,500-19.999, not adjacent to a metro area 8. Completely rural or less than 2,500 urban population, adjacent to a metro area 9. Completely rural or less than 2,500 urban population, not adjacent to a metro area Demographics & general political orientation are included with Project Implicit. [1]: https://app-prod-03.implicit.harvard.edu/implicit/Launch?study=/user/calvin/sustain2/sustain2.expt.xml&refresh=true