“…We recruited U.S. respondents nationally through Amazon's Mechanical Turk (MTurk) and through the GfK Knowledge Panel (GfK) to answer questions on efficacy beliefs, knowledge, concern, and policy support (Crosman et al., ). MTurk is an opt‐in survey platform, but still more representative of the U.S. public than student samples (Levay, Freese, & Druckman, ; Paolacci & Chandler, ), producing results similar to those from conventional samples across a wide variety of social and behavioral science experiments and surveys (Amir & Rand, ; Clifford, Jewell, & Waggoner, ; Dryden, Morgan, Bostrom, & de Bruin, ; Gosling & Mason, ; Horton, Rand, & Zeckhauser, ; Simons & Chabris, ; Weinberg, Freese, & McElhattan, ). KnowledgePanel is an address‐based U.S. population sample representative of the U.S. adult population (Crosman et al., ).…”