Marco C. Yzer

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In the context of health campaigns, interpersonal communication can serve at least 2 functions: (a) to stimulate change through social interaction and (b) in a secondary diffusion process, to further disseminate message content. In a 3-wave prospective study of 1,079 smokers, the authors demonstrate that mass media messages (antismoking campaigns and news(More)
Behavioural theorists have identified attitudes, perceived norms and self-efficacy as the important determinants of people's intentions to engage in a given behaviour. Because intentions predict behaviour, these same variables also account for a considerable amount of the variation in behaviour. Nevertheless, there is often a substantial proportion of the(More)
BACKGROUND This study brings together the fragmentary knowledge on social influence factors related to smoking cessation. An inventory of social influence variables shows six social influence factors. With the exception of descriptive norm, most of these are rarely studied in the context of smoking cessation. METHODS Regression analysis on the data of(More)
Previous research has highlighted brain regions associated with socioemotional processes in persuasive message encoding, whereas cognitive models of persuasion suggest that executive brain areas may also be important. The current study aimed to identify lateral prefrontal brain areas associated with persuasive message viewing and understand how activity in(More)
Perceived message effectiveness is often used as a diagnostic tool to determine whether a health message is likely to be successful or needs modification before use in an intervention. Yet, published research on the antecedents of perceived effectiveness is scarce and, consequently, little is known about why a message is perceived to be effective or(More)
This study tests implications of different time specifications in behavioral definitions as used in belief-elicitation research. Using construal level theory and the theory of planned behavior as complementary frameworks, the authors examined temporal frame effects on beliefs about eating fruits and vegetables and beliefs about condom use generated in a(More)
Health message quality is best understood in terms of a message's ability to effectively produce change in the variables that it was designed to change. The importance of determining a message's effectiveness in producing change prior to implementation is clear: The better a message's potential effectiveness is understood, the better able interventionists(More)
Successful anti-marijuana messages can be hypothesized to have two types of effects, namely persuasion effects, that is, a change in people's beliefs about using marijuana, and priming effects, that is, a strengthened correlation between beliefs and associated variables such as attitude and intention. This study examined different sets of anti-drug(More)
Many studies have found smokers' quit history to correlate with quitting smoking, but little is known about the psychological processes explaining this relationship. This study uses the integrative model of behavioral prediction to examine how quit history affects quit intention. Data from 3,428 Dutch smokers demonstrate that quit history affects (a)(More)