These surveys have been fielded between the late 1990s and 2022. Most involve randomized choice experiments, and we include just one instance of each survey. Our earliest surveys were classroom surveys or jury-pool surveys, using pencil-and-paper survey modes. Other early surveys were conducted by mail.
Our online surveys, in most cases, also explore a number of design variations. We do not include examples for every one of these variations (and not all of the consequences of these design differences have yet been fully analyzed). Also, in most of the online surveys, respondent answers occasionally dictate different branching within the survey, and we do not include examples of all possible paths through these branches.
Our online survey technology has also changed over time. For our earliest online climate change survey, we built our own online survey infrastructure using the Perl programming language. For the main surveys about health risk reductions, for which we are grateful to have had a much more substantial budget, we used Knowledge Networks (a premium survey research firm in the early 2000s which has been sold at least twice since then). Our most recent surveys have taken advantage of the Qualtric platform, supplemented by special-purpose Javascript components designed by our team.
(NOTE. These survey instruments all bear an arbitrary January 1900 date, to force their entries to the bottom of the list of Publications.)