Visschers, Vivianne

Visschers, Vivianne


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  • Publikation
    How to eat healthy and save the planet. Development and evaluation of an evidence-based app
    (2019) Feck, Vanessa; Herrmann, Anne; Visschers, Vivianne
    Background: Food consumption affects individuals as well as our planet. How can a tailored app help people to make healthier and more sustainable meal choices? To answer this question, we contributed to the development of an evidence-based dietary app and evaluated its effects. The app offers personalized recipes and tips in order to reduce food waste and meat consumption, and increase the use of seasonal and plant-based products. Method: Using a mixed-methods approach, app usage data (N=2167) and quantitative data from a longitudinal online questionnaire (T1-T3: N=56) were combined with in-depth interviews with users (N=6) and app-developers (N=3). Findings: In the interviews, users evaluated the personalized recipe-suggestions positively. An additional search (e.g. recipes with certain ingredients) was often no longer necessary to find a suitable recipe. The app metrics showed positive correlations between frequent app usage and the motivation to reduce food waste (r=.06, p<.05) as well as the motivation to use seasonal products (r=.16, p<.01). The survey data showed that participants’ initial confidence to implement new dietary behavior was a strong predictor of the implementation of new dietary behavior after three weeks of app usage (β≥.49, p≤.01, R2 = .66). Last, the development team emphasized the benefits of an iterative approach in which regular user feedback informed the further development process of the app. Discussion: The results of this research show that it can be effective to combine health- and sustainability-focused diet interventions. These interventions should be personalized and aim to increase users’ confidence to perform new dietary behavior.
    06 - Präsentation
  • Publikation
    Development of targeted communication strategies to promote prudent antibiotic usage: needs assessment among the public
    (23.08.2018) Feck, Vanessa; Visschers, Vivianne; Herrmann, Anne
    Background: Public behaviour is a crucial factor to reduce the risk of antibiotic resistance. A better understanding of the public‘s attitudes, knowledge and beliefs regarding antibiotics and antibiotic resistance is required to recommend effective communication strategies to promote a more prudent antibiotic usage as well as the adoption of measures to prevent the spread of resistant bacteria. Method: An online survey was conducted among the Swiss population (N = 1,260). We applied cluster analysis to identify segments based on the respondents‘ demand for and perception of antibiotics. Through multiple ANOVAs, segments were compared on their demographic characteristics, knowledge, as well as on their cultural values and other variables, such as perceived responsibility. Findings: Four segments were identified. They differed significantly on all perception variables and their demand for antibiotics (Fs > 58, ps < .001, ηp2s > .13): (1) Experienced Sceptics reported a low demand and usage of antibiotics, were aware of the risks and had more experience with antibiotic resistance. (2) Knowledgeable Undifferentiated had lots of knowledge about antibiotics, antibiotic resistance and preventive measures but were neither very concerned about antibiotic resistance nor did they perceive many benefits in using antibiotics. (3) Young Unwilling showed little willingness to adopt preventive measures, were younger and rather uncritical regarding antibiotics. (4) Self-Serving Users reported a high demand and usage of antibiotics, perceived a rather low responsibility and held strong egoistic values. Discussion: To promote prudent antibiotic usage, recommendations for communication strategies were developed targeting the different segments‘ needs.
    06 - Präsentation
  • Publikation
    “Contradictio in opinionibus”: The Swiss public’s attitudes and beliefs about antibiotics and antibiotic resistance
    (18.06.2018) Visschers, Vivianne; Feck, Vanessa; Herrmann, Anne
    One of the actors involved in the growing risk of antibiotic resistance is the general public. Its perceptions and decisions (i.e., its mental models) regarding antibiotics and antibiotic resistance determine how much antibiotics are used and how willing people are to adopt measures to prevent the spread of resistant bacteria. For the development of intervention strategies and materials that promote the prudent use of antibiotics and the adoption of preventive measures, we thus need to understand the public’s mental models of antibiotics and antibiotic resistance. We conducted an interview study (N = 10) and an online survey (N = 1,260) to investigate the Swiss public’s attitudes, beliefs, knowledge and perceived social influences regarding antibiotics and antibiotic resistance. Moreover, using the survey data, we examined how these concepts—in addition to people’s demographic characteristics, experiences with antibiotics and cultural values—relate to their request for antibiotics and their willingness to adopt preventive measures against antibiotic resistance. In both studies, respondents held contradicting opinions (i.e., beliefs and attitudes) about antibiotics and antibiotic resistance. The same individuals, for example, correctly knew that bacteria became resistant against antibiotics and, at the same time, incorrectly believed that their own body became resistant. The survey data additionally showed that respondents’ contradicting attitudes and beliefs affected their request for antibiotics. Respondents’ request for antibiotics was mostly predicted by egoistic values, knowledge about antibiotics and the perceived benefits of antibiotics. Alternatively, their willingness to adopt preventive measures was mainly related to traditional values and biospheric values, their knowledge about preventive measures as well as their perceived risks of antibiotics and of antibiotic resistance. Stronger perceived norms in respondents’ social environment regarding prudent antibiotic usage were related to both a lower request for antibiotics and a higher willingness to adopt preventive measures. In sum, different psychological factors need to be addressed in an intervention to promote both a more prudent antibiotic usage and the adoption of preventive measures among the general public. We will particularly discuss how opposing attitudes and beliefs can be addressed in such intervention materials.
    06 - Präsentation
  • Publikation
    Wie nehmen Konsumenten Antibiotika, Antibiotikaresistenzen und Antibiotikaverbrauch wahr?
    (06/2018) Visschers, Vivianne; Feck, Vanessa; Herrmann, Anne
    06 - Präsentation