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Supplemental material, sj-docx-1-scx-10.1177_10755470231162634 for Science Communication as a Collective Intelligence Endeavor: A Manifesto and Examples for Implementation by Dawn Holford, Angelo Fasce, Katy Tapper, Miso Demko, Stephan Lewandowsky, Ulrike Hahn, Christoph M. Abels, Ahmed Al-Rawi, Sameer Alladin, T. Sonia Boender, Hendrik Bruns, Helen Fischer, Christian Gilde, Paul H. P. Hanel, Stefan M. Herzog, Astrid Kause, Sune Lehmann, Matthew S. Nurse, Caroline Orr, Niccolò Pescetelli, Maria Petrescu, Sunita Sah, Philipp Schmid, Miroslav Sirota and Marlene Wulf in Science Communication

Questions for asessing knowledge about 1.5 degree goal

We study how Germans perceive the 2 (1.5)C target. We assess (a) whether Germans know the 2 (1.5)C target; how they relate global temperature change of 2 (1.5) degrees to (b) the correct past time reference point, namely the beginning of industrialization, and (c) the correct future time reference point, namely that warming should never exceed more than 2 degrees. In 2022, we replicate three questions asked to GESIS Panel participants in 2016, so as to assess whether perceptions have changed over time. We will relate participants’ answers to established measures from the GESIS environmental core study, namely perceived severity of climate change, attitudes towards German climate politics, environmental world views, as well as demographic variables. Results will help understanding how different Germans understand the most important global climate goal, the 2 (1.5)C target. This includes identifying subgroups of the population that will particularly benefit from communications about the 2 (1.5)C target. This data is complemented with N=28 semi-structured interviews with members of the general German population, for assessing the range of perceptions associated with the 1.5 degree target and climate policy goals more generally. Findings will help designing simple and effective communications about the 2 (1.5)C target and related climate policy goals.

The file contains the questionnaire wordings for all measures used in this project