C. K. Mertz

Gender, race, and perceived risk: The 'white male' effect

Risks tend to be judged lower by men than by women and by white people than by people of colour. Prior research by Flynn, Slovic and Mertz [Risk Analysis, 14, pp. 1101-1108] found that these race and gender differences in risk perception in the United States were primarily due to 30% of the white male population who judge risks to be extremely low. The specificity of this finding suggests an explanation in terms of sociopolitical factors rather than biological factors. The study reported here presents new data from a recent national survey conducted in the United States. Although white males again stood apart with respect to their judgements of risk and their attitudes concerning worldviews, trust, and risk-related stigma, the results showed that the distinction between white males and others is more complex than originally thought. Further investigation of sociopolitical factors in risk judgements is recommended to clarify gender and racial differences.

Less Is More in Presenting Quality Information to Consumers

Much effort has been put into improving measures of health care quality. Although early research suggested that consumers made little use of quality reports, most reports were based on nonstandardized measures and were not user friendly. Information presentation approaches, however, will have a significant influence on what information is attended and used. The present research examines whether information presentation methods differentially influence consumers who differ in numeric skills. Results of three studies support the idea that “less is more” when presenting consumers with comparative performance information to make hospital choices. Results were particularly strong for those lower in numeracy, who had higher comprehension and made better choices when the information-presentation format was designed to ease the cognitive burden and highlight the meaning of important information. These findings have important implications for the sponsors of comparative quality reports designed to inform consumer decision making in health care.

Development and Testing of an Abbreviated Numeracy Scale: A Rasch Analysis Approach

ABSTRACT Research has demonstrated that individual differences in numeracy may have important consequences for decision making. In the present paper, we develop a shorter, psychometrically improved measure of numeracy—the ability to understand, manipulate, and use numerical information, including probabilities. Across two large independent samples that varied widely in age and educational level, participants completed 18 items from existing numeracy measures. In Study 1, we conducted a Rasch analysis on the item pool and created an eight‐item numeracy scale that assesses a broader range of difficulty than previous scales. In Study 2, we replicated this eight‐item scale in a separate Rasch analysis using data from an independent sample. We also found that the new Rasch‐based numeracy scale, compared with previous measures, could predict decision‐making preferences obtained in past studies, supporting its predictive validity. In Study, 3, we further established the predictive validity of the Rasch‐based numeracy scale. Specifically, we examined the associations between numeracy and risk judgments, compared with previous scales. Overall, we found that the Rasch‐based scale was a better linear predictor of risk judgments than prior measures. Moreover, this study is the first to present the psychometric properties of several popular numeracy measures across a diverse sample of ages and educational level. We discuss the usefulness and the advantages of the new scale, which we feel can be used in a wide range of subject populations, allowing for a more clear understanding of how numeracy is associated with decision processes. Copyright

Bringing Meaning to Numbers: The Impact of Evaluative Categories on Decisions.

Decision makers are often quite poor at using numeric information in decisions. The results of 4 experiments demonstrate that a manipulation of evaluative meaning (i.e., the extent to which an attribute can be mapped onto a good/bad scale; this manipulation is accomplished through the addition of visual boundary lines and evaluative labels to a graphical format) has a robust influence in health judgments and choices and across diverse adult populations. The manipulation resulted in greater use of numeric quality-of-care information in judgments and less reliance on an irrelevant affective state among the less numerate. Recall results for provided quality-of-care numbers suggested that the manipulation did not influence depth of number processing with the exception of cost information that was not remembered as well. Results of a reaction-time paradigm revealed that feelings were more accessible than thoughts in the presence of the manipulation, suggesting that the effect may be due, at least in part, to an affective mechanism. Numeric information is often provided in decisions, but may not be usable by consumers without assistance from information providers. Implications for consumer decision making and the functions of affect are discussed.

The impact and acceptability of Canadian-style cigarette warning labels among U.S. smokers and nonsmokers

Cigarette smoking is a major source of mortality and medical costs in the United States. More graphic and salient warning labels on cigarette packs as used in Canada may help to reduce smoking initiation and increase quit attempts. However, the labels also may lead to defensive reactions among smokers. In an experimental setting, smokers and nonsmokers were exposed to Canadian or U.S. warning labels. Compared with current U.S. labels, Canadian labels produced more negative affective reactions to smoking cues and to the smoker image among both smokers and nonsmokers without signs of defensive reactions from smokers. A majority of both smokers and nonsmokers endorsed the use of Canadian labels in the United States. Canadian-style warnings should be adopted in the United States as part of the countrys overall tobacco control strategy.

Evaluating chemical risks: results of a survey of the British Toxicology Society

1 Members of the British Toxicology Society partici pated in a survey to determine their attitudes, beliefs, and perceptions regarding risks from chemicals. Similar surveys had previously been conducted with toxicologists and members of the general public in the United States and Canada. Data from 312 completed questionnaires were analyzed. 2 In general, the British toxicologists judged risks to be quite low for most hazards, with the exception of cigarette smoking and asbestos. They tended to have quite favorable attitudes toward the use of chemicals and were confident about the adequacy of chemical regulations. 3 As in previous studies of toxicologists, women expressed higher perceptions of risk than did men and had consistently stronger anti-chemical attitudes. 4 Toxicologists working in industry had more favorable attitudes towards chemicals and their use than did those working in academic settings. 5 When asked to evaluate technical summaries of various animal studies there was considerable dis agreement among the respondents about the toxicity of the chemicals involved. 6 In general, British toxicologists were equivocal about the reliability of animal studies in predicting human effects (particularly carcinogenicity) probably be cause of the belief that animal studies overestimate risk. However, they were rather confident that human health risks could be assessed reasonably accurately.

Health risk perception in Canada II: Worldviews, attitudes and opinions

Abstract In this article, we present the results of a national survey of 1500 Canadians on their attitudes and opinions about health risks. Ratings of perceived risk, sources of information on health risks and responsibility for risk management were also investigated, with findings reported separately. A high degree of concern about health risks was associated with industrial pollution and chemical products (with the exception of medicines), with almost complete agreement that the land, air and water are more contaminated than ever. In addition, there was widespread belief that a risk‐free environment was an achievable goal, and an unwillingness to accept some health risks to improve the economy. Lifestyle factors such as diet, exercise, and tobacco smoking were perceived to be important modifiers of health risk. On the other hand, many respondents endorsed the idea that they had little control over the risks to their health.

Acceptable practices in Ontario's forests: Differences between the public and forestry professionals

We compare and contrast survey responses to statements about 1) environmental values, 2) agreement with forest management goals and approaches, 3) perceptions of risk, 4) trust in science and government, and 5) acceptability of forestry practices between the public and three groups of forestry professionals (government biologists, government foresters, and industry foresters) in Ontario. The survey emphasized issues surrounding forest vegetation management due to the contentious nature of herbicide use. Responses were gathered from a 140-question telephone survey administered from September and November 1994 to 1,500 members of the general public and 201 forestry professionals across the province. Forestry professionals tended to be less supportive of some environmental values and forest management goals, perceive everyday and forestry activities to be less risky, be more trusting of science and government, and be more accepting of forestry activities than the general public. Among the three groups of forestry professionals, industry foresters tended to be most different from the public, followed by government foresters, and government biologists. These differences reveal potential sources of conflict and miscommunication between the public and forest managers. Recognizing these differences can help improve communications with the public about forest management plans.

Public Support For Earthquake Risk Mitigation In Portland, Oregon

During the 1980s, seismic research suggested that Oregon and the City of Portland had a higher risk of a major earthquake than had previously been assumed. In 1993, the State of Oregon adopted a new version of the Oregon Structural Specialty Code, which changed the designation of western Oregon from seismic zone 2b to seismic zone 3. The City of Portland established a program and a Task Force on Seismic Strengthening of Buildings to recommend actions that would encourage upgrading of city buildings. A survey of adult city residents was conducted in April, 1996 to determine public attitudes and opinions about earthquake risks, management and mitigation of earthquake hazards, priorities for protection by strengthening buildings, evaluations of strategies for informing the public about earthquake risks, and support for specific options the city might take to protect citizens against earthquake events. Social and demographic information on individuals and households was also collected. Respondents provided ratings for a wide range of social and environmental risks, provided information on priorities for strengthening key buildings and infrastructure facilities, and answered hypothetical questions about voting for bond measures to pay for city earthquake-mitigation programs. Respondents recognized significant risk from earthquakes and supported programs to protect people, especially vulnerable residents such as children and the sick. There was strong support for protecting emergency response capabilities. There was much less support for using public funds to reduce the risks associated with privately owned buildings. There were also some strong pockets of resistance to publicly funded mitigation programs in response to the hypothetical bond measures.

Nuclear Power and the Public

This study is an attempt to understand attitudes, perceptions, and behaviors with respect to nuclear power and several other technological risk sources. A unique feature of the study is a comparison between public views in the United States, where nuclear energy is resisted, and France, where nuclear energy appears to be embraced (France obtains about 80% of its electricity from nuclear power).