Emerging Adulthood Measured Across Multiple Institutions 2 (EAMMi2): Preregistered and Exploratory Hypotheses Jon Grahe Pacific Lutheran University Background and Purpose Hypotheses & Results Discussion The Emerging Adulthood journal published a special issue in June, 2016 (Reifman & Grahe, 2016) with 9 research reports (J. Arnett Discussant) examining different slices of the same data set including responses from 14 different institutions (total N >1300) with topics such as self-identities, mindfulness, psychopathy, disabilities, belongingness, politics, family values, and institutional selectivity. However, there were only 10 samples and the data were collected in 2004 using paper and pencil surveys. The Emerging Adulthood Measured at Multiple Institutions 2: The Next Generation (EAMMi2; https://osf.io/te54b) partially replicated and extended that study. The EAMMi2 survey includes two Emerging Adulthood (EA) scales (Markers of Adulthood and the 8-item IDEA) as well as a series of other measures selected by a project planning committee. Contributors recruited samples using a location-specific survey link after demonstrating local IRB approval with the goal of recruiting at least 80 respondents at each location. Contributors could also submit preregistered reports for a special issue in the Emerging Adulthood journal (January, 2017 deadline) in addition to making novel hypotheses either in a pre-registered format or using exploratory analytic approaches. The EAMMi2 is intended to generate data useful to answer many theoretically meaningful hypotheses as well as provide useful teaching examples. Though early in the analysis process, findings from multiple pre-registered hypotheses received support using the EAMMi2 data including Grahe & Corker (2017), Chalk (2017), and Hermann & Brunell (2017). Interested readers should visit the EAMMi2 ‘a priori hypotheses” component (https://osf.io/6mb3f/) to see other hypotheses posed or post a novel one. Exploratory Patterns suggest further research questions still remain to be addressed with these data. Limitations. All survey research is flawed, and these respondents completed this 30 min. survey in uncontrolled situations. The age variable only includes data from 2000 respondents because of a technical error. Future Research. Although a recent edited volume (Žukauskienė, 2016) presents a series of reports regarding Emerging Adulthood across European samples, there is still no comprehensive evaluation that measures EA conceptualizations across cultures. Grahe et al. (2017). Pre-registered hypotheses replicating Fosse & Toyokawa Exploratory Correlations between Markers of Adulthood and EAMMi2 Constructs 1 EAMMi3: The International Edition The EAMMi2 represented a large scale measurement of the transition across many locations, but the majority of the sample was from the United States, The EAMMi3: The International Edition is directed at expanding across cultures for the first true evaluation across many cultures (https://osf.io/jyz99/). The EAMMi3 will be shorter (15 minutes) and Culturally Inclusive Project Timeline: Mar-Aug, 2017-- Recruit Contributors; Solicit Scale Submissions Sept-Dec, 2017-- Construct Survey, Translate, IRB Approval Jan-Dec, 2018-- Data Collection with the goal of: Nsamples>99; Nrespondents>10,000   Method Map of EAMMi2 Contributor Locations Participants. Contributors from 33 locations; Nstarted = 4091, Ncleandata = 3145, Sex (749 men; 2229 women; 52 other); Age (between 18-28, M = 20.26, SD = 2.279), Income (N = 3013; Median = 40-59,999), Residency (2647 US Residents; 379 non-US Residents). Materials. The EAMMi2 planning committee reviewed 10 proposals of measure to add to the EAMMi2 survey. After pilot testing, they survey included over 200 items for 18 scales and demographics. The complete survey can be reviewed at the EAMMi2 project page (https:osf.io/te54b) Procedure. After receiving local IRB approval, contributors received a location specific survey so that recruitment numbers could be tracked. Each EAMMi2 contributor provided a description of recruiting methods which ranged between in-lab data collection, random sampling of social media contacts, and emails to students at the host institution (https://osf.io/5pdvy). Contact Information Jon Grahe graheje@plu.edu For more information, please visit: http://osf.io/te54b Acknowledgements and Funding The EAMMi2 was partially supported by an APS Teaching Fund Grant and a Pacific Lutheran University Regency Award to Jon Grahe. Please visit https://osf.io/8dgaf/ for additional funding support. The EAMMi2 included researchers from 33 institutions in the US, England, Greece, and the Caribbean (see map). This research was not possible without their contribution.