Re-Routing Persuasion: How Conversion Messages Boost Attitudes and Reduce Resistance Among Holdouts Unvaccinated for COVID-19.

This study examined the persuasive effects of two-sided refutational conversion messages compared to one-sided advocacy messages in increasing pro-COVID-19 vaccination attitudes and reducing resistance to getting vaccinated among U.S. adults who self-reported as unvaccinated. Results showed that main effects of conversion messages led to significantly higher attitudes but failed to directly reduce resistance toward vaccination. Predicted mediation effects between conversion messages and the dependent variables were found for homophily but were not supported for argument strength. Significant group differences were detected between participants who self-reported as high or low in vaccine hesitancy, for structural equation models that significantly and indirectly led to decreased resistance. Findings show the potential for two-sided conversion messages to be used by public health message designers to affect pro-health outcomes. Implications and limitations of these results and future directions are discussed.

Facing the Strain: The Persuasive Effects of Conversion Messages on COVID-19 Vaccination Attitudes and Behavioral Intentions.

This study examined two-sided conversion messages in relation to one-sided advocacy messages in reducing vaccine hesitancy related to COVID-19 vaccine uptake. Results demonstrated that, for vaccine-hesitant participants, conversion messages increased pro-COVID-19 vaccination attitudes and behavioral intentions. For high vaccine-hesitant participants, the relationship between conversion messages and attitudes toward COVID-19 vaccinations was mediated through source credibility. For low vaccine-hesitant participants, mediation occurred through counterarguing. Findings have implications for health message tailoring related to COVID-19 vaccine uptake.

Do Storytelling and Processing Motivation Matter? Comparing Narratives and Exemplars in Promoting Hepatitis C Screening among College Students.

Encouraging hepatitis C screening, particularly among young adults who are at increased risk of infection, is essential for eliminating viral hepatitis. A 3 (narrative vs. exemplar vs. informational message) × 2 (processing motivation: low vs. high) between-subjects experiment was conducted among college students to compare the effectiveness of different message strategies and examine the moderating role of processing motivation. Findings revealed that the narrative was perceived more favorably than the exemplar message, and both messages led to a greater screen intention than the informational message. The narrative persuaded by increasing transportation and identification and, then, enhancing message perceptions. However, these mediation paths did not explain the effects of the simple exemplar. Moreover, the effects of the narrative and the exemplar did not differ significantly depending on levels of processing motivation. The study advances a theoretical understanding of the differences between narratives and exemplars. It also offers practical suggestions for campaign message design.

Examining the Effects of Celebrity (Vs. Noncelebrity) Narratives on Opioid Addiction Prevention: Identification, Transportation, and the Moderating Role of Personal Relevance.

Celebrity disclosures and narratives are popular strategies in health promotion. However, less is known about their joint effects and the mechanisms through which they function. A 2 (narrative type: celebrity vs. layperson) x 2 (personal relevance: low vs. high) online experiment (N = 248) tested the impact of different narrative types in increasing awareness about prescription opioid abuse. Results indicated that a celebrity narrative is more persuasive than its layperson counterpart. Also, personal relevance toward opioid addiction moderated the influence of narrative type. Celebrity narratives evoked more positive attitudes toward opioid prevention and greater behavioral compliance intentions with the recommended action for low-relevance individuals. Transportation and identification mediated the effects of celebrity narratives on participants' issue attitudes and behavioral intentions, but only for low-relevance individuals. Practically, the data suggest that incorporating celebrities in health narratives about opioid addiction prevention facilitates behavioral compliance, especially for individuals to whom a pressing health issue like opioid misuse is currently of low relevance.

Effects of Narratives and Behavioral Involvement on Adolescents' Attitudes toward Gaming Disorder.

This paper examines the impact of using narratives to communicate a controversial health issue, gaming disorder, on adolescents' issue attitudes. In a between-subjects experiment, 115 adolescent participants read either a narrative or an informational message on gaming disorder. Results indicated that compared to the informational message, the narrative health message generated more positive attitudes toward the medical view of problematic gaming and greater attitude certainty. Transportation mediated the narrative's effect on attitudes. Behavioral involvement moderated the narrative's effect on attitudes and attitude certainty, such that the positive effects of the narrative on attitudes and attitude certainty were more pronounced for high-involvement adolescents than for low-involvement adolescents. In addition, behavioral involvement also enhanced the effect of message absorption on attitudes. By extending our research on narrative effects to the adolescent population, this study presents findings with both theoretical and practical implications.

Effects of narratives, frames, and involvement on health message effectiveness.

An online 2 (evidence type: narrative vs. informational) × 2 (message frame: gain vs. loss) × 2 (involvement: low vs. high) between-subjects factorial experiment was conducted to examine their effects in skin cancer awareness campaigns. Results showed that loss-framed narratives were convincing for high-involved individuals, whereas both gain-framed informational and loss-framed narratives evoked higher issue attitudes and behavioral intentions for low-involved ones. Mediation analyses showed that identification with the story protagonist mediated narrative effects on the outcome variables. Theoretical and practical implications for sun protection awareness campaigns are discussed.

Incipient fault diagnosis and amplitude estimation based on K-L divergence with a Gaussian mixture model.

In this paper, a method of incipient fault diagnosis and amplitude estimation based on Kullback-Leibler (K-L) divergence is proposed. An incipient fault is usually regarded as the precursor of a significant system fault, but due to a low amplitude and non-obvious characteristics, it is easy for such a fault to be hidden by disturbance and noise. Based on this and considering the sensitivity of the K-L divergence method in data feature extraction, a method of diagnosing incipient faults is designed. In order to consider the safety performance and lay a foundation for the fault tolerance of the system, an amplitude estimation method for incipient faults is also proposed. By mapping the characteristic change in the residual data to the numerical change in the K-L divergence, the amplitude of the incipient fault can be measured with high sensitivity. Considering the generality of the method, a Gaussian mixture model is used to model the residual data in order to increase the accuracy of fault amplitude estimation. Finally, the effectiveness of the proposed method for incipient fault diagnosis and amplitude estimation is verified by experiment.

The effects of health narratives: Examining the moderating role of persuasive intent.

Prior research has indicated that narratives are more persuasive than nonnarrative messages. One of the reasons for this effectiveness is that the narratives' intention to persuade is often not explicit, thus making them less likely to be disputed. The goal of this research is to examine the moderating role of persuasive intent in narrative persuasion. To do so, we conducted a 2 (Message format: narrative vs. nonnarrative messages) × 2 (Persuasive intent: intent vs. no intent) experiment with a factorial design among 205 participants on the effects of health narrative messages. Results indicated that persuasive intent undermined the effects of health narratives on persuasion by reducing believability and increasing reactance. Both believability and reactance partially mediated the effects of the narrative messages on attitudes and behavioral intention.

The effectiveness of using entertainment education narratives to promote safer sexual behaviors of youth: A meta-analysis, 1985-2017.

BACKGROUND: Risky sexual behaviors are associated with the transmission of sexually transmitted infections (STIs) and unwanted pregnancies, both major health concerns for youth worldwide. This review studies the effectiveness of narrated mass media programs in promoting safer sexual practices among youth in developed and developing countries. METHODS: Electronic and manual searches were conducted to identify experimental and quasi-experimental studies with robust counterfactual designs published between 1985 and the first quarter of 2017. Effect sizes were meta-analyzed using mixed-effects models. RESULTS: Eight experimental and two quasi-experimental studies met our inclusion criteria. The aggregated sample size was 23,476 participants, with a median of 902 participants per study. Entertainment education narratives had small but significant effects for three sexual behaviors. It reduced the number of sexual partners [standardized mean difference, (SMD) = 0.17, 95% confidence interval (CI) = 0.02-0.33, three effect sizes], reduced unprotected sex (SMD = 0.08, 95% CI = 0.03-0.12, nine effect sizes), and increased testing and management for STIs (SMD = 0.29, 95% CI = 0.11-0.46, two effect sizes). The interventions were not effective in reducing inter-generational sex, measured through the age-gap with sexual partners (SMD = 0.06, 95% CI = -0.06-0.19, four effect sizes). Entertainment education had medium-size effects on knowledge outcomes (SMD = 0.67, 95% CI = 0.32-1.02, seven effect sizes), where a time-decay relationship is observed. No effects were found on attitudes. CONCLUSION: Although mass media entertainment had small effects in promoting safer sexual practices, its economies of scales over face-to-face interventions suggest its potential to be a cost-effective tool above an audience threshold. The use of study participants from the general youth population and the use of mostly effectiveness trials mitigate concerns regarding its scalability. The overall paucity of high-quality studies affirms the need for strengthening the evidence base of entertainment education. Future research should be undertaken to understand the moderator effects for different subgroups and intervention characteristics.

Benefits for me or risks for others: a cross-culture investigation of the effects of message frames and cultural appeals.

This study examined the effects of message frames when they were culturally tailored. Focusing on one aspect of culture-individualism and collectivism-the study discovered some similar patterns across cultures: The effect of message framing in motivating preventive behaviors could be moderated by the cultural values embedded in the messages. Messages focusing on individualistic gains and collectivistic losses successfully increased people's intention to adopt preventive behaviors. Practical and theoretical implications are discussed.

Impact of locus of control on health message effectiveness.

This article examined how individuals' locus of control might moderate the effect of health message frames. An experiment was conducted whereby participants read either individual- or social-responsibility message frames after their locus of control was primed. Results indicated that messages presented in individual-responsibility frames were more persuasive when people were primed with internal locus of control, whereas social-responsibility framed appeals were more persuasive when people were primed with external locus of control. These results were found for individuals in both high and low cognitive load conditions. Theoretical and practical implications of the findings are discussed.

Communicating the risks of fetal alcohol spectrum disorder: effects of message framing and exemplification.

Health messages can be either informative or descriptive, and can emphasize either potential losses or gains. This study, guided by message framing theory and exemplification theory, specifically investigated the combined effects of messages with loss-gain frames mixed with statistics or exemplar appeals. The findings revealed a series of main effects and interactions for loss-gain frames and statistics-exemplar appeals on fetal alcohol spectrum disorder (FASD) prevention intention, intention to know more, perceived severity, perceived fear, perceived external efficacy, and perceived internal efficacy. The gain-statistics appeal showed an advantage in promoting perceived efficacy toward FASD, while the loss-exemplar appeal revealed an advantage in increasing prevention intention, perceived severity, and perceived fear toward FASD. Limitations and implications for future research are discussed.