A Methodological Taxonomy for Warnings Research

Beginning with several empirical papers in the late 1970's, there has been considerable research concerned with assessing the effectiveness of such attempted safety interventions as on-product warnings and safety signs. The focus of research on warnings has shifted from a debate on whether warnings work to systematic investigation of the factors that do or could influence safety-related product-user behavior. From the perspective of safety, the logical test of a warning must be reduction of the frequency and/or severity of accidents and injuries. A taxonomy of available research methods is described; strengths and problems associated with each method are discussed. Although research on topics related to warnings may legitimately address a wide variety of psychological issues, informed safety policymaking should rely primarily on well-controlled real-world studies. Within the restricted aim of making unambiguous contributions to generalizations that can inform safety policy, some methodological cautions are appropriate for both researchers and practitioners.

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