Malka et al. (2009)
Also: Malka et al. 2009
Featuring skeptics in news media stories about global warming reduces public beliefs in the seriousness of global warming
Malka, A., Krosnick, J. A., Debell, M., Pasek, J., & Schneider, D. (2009). Featuring skeptics in news media stories about global warming reduces public beliefs in the seriousness of global warming. Woods Institute for the Environment, Stanford University, Technical Paper. Link to PDF
References
All IPCC definitions taken from Climate Change 2007: The Physical Science Basis. Working Group I Contribution to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change, Annex I, Glossary, pp. 941-954. Cambridge University Press.