ESRI Working Paper No. 775 - Survey instruc�ons bias percep�ons of

The discrepancy between the CSO estimate and our unweighted sample is due to the use of social grade instead of education in the quota sampling applied by the market research agency. [...] We also report exploratory tests that show the effect of the instructions on rating scales for the other environmental health hazards in addition to the association between the rating scales and budget allocation task and reported EMF mitigative behaviour. [...] On the Severity and Relevance models, the difference between the EMF-salient instructions and control instructions is non-significant, but the CO- salient instructions elicited significantly lower perceptions of risk than the EMF-salient instructions on both (Figures 3.1c and 3.1d). [...] To illustrate the effect of risk salience on perceived risk, we compared the proportion of participants in the EMF-salient and CO- salient group who responded above the midpoint for each EMF scale. [...] Error bars are the standard error of the mean and the y-axis is scaled to two and a half standard deviations to show the effect size.