Objective-To evaluate adolescents' responses to cigarette advertisements for diVerent brands. Design-Adolescents were shown one print advertisement for each of five cigarette brands (Camel, Marlboro, Kool, Benson & Hedges, and Lucky Strike). They indicated on a structured questionnaire how many times they had seen the advertisement (or one almost like it), how much they liked it, whether or not they thought it made smoking more appealing, and whether or not it made them want to smoke cigarettes of that brand. Setting-Middle school and high school classrooms, seven schools in four states in the United States (New York, Pennsylvania, Ohio, and Texas). The classrooms were selected randomly within each school. Participants-534 adolescents in grades 6-12 (ages 11-18 years) from seven schools in four states, 54% female, 76% white. Results-The advertisements for Camel and Marlboro were more likely than the advertisements for the other brands to be seen, to be liked, to be viewed as making smoking appealing, and to influence adolescents to want to smoke cigarettes of that brand. More than 95% of the adolescents had seen an advertisement featuring Joe Camel or the Marlboro Man at least once, and more than 50% had seen these advertisements six or more times. Nearly half believed that the Joe Camel advertisement makes smoking more appealing, and 40% believed that the Marlboro Man advertisement makes smoking more appealing. Adolescent smokers were more likely than nonsmokers to believe that the advertisements for Camel and Marlboro make smoking more appealing. Conclusions-The advertisements most popular among adolescents are for two of the brands they are most likely to smokeMarlboro and Camel. The results of the study are consistent with the view that certain cigarette advertisements enhance the appeal of smoking to many adolescents. (Tobacco Control 1998;7:129-133)
Online research has experienced astonishing growth over the past 15 years. To keep up with this growth, researchers have developed new ways of accessing and utilising respondents. Nevertheless, they can still find it difficult to complete the needed number of interviews on time, particularly when the target population is rare or in high demand. For this reason, it is common today for researchers to use more than one sample source for some types of project, such as a tracking survey that measures change over time. Adding one or more sample source to the original might address the need for more respondents, but some evidence suggests that it might also decrease sample representativeness and reduce response accuracy. In this paper, we introduce a new methodology that enables researchers to select potential survey respondents from either a single sample source or multiple sources based on how well their characteristics match an appropriate, evolving standard with demonstrated evidence of external validity. We also present evidence suggesting that, in the aggregate, respondents who are selected through the new methodology are more representative of the target population than respondents selected by other means. Finally, we consider possible implications of the new methodology on methods other than online research with non-probability samples.
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