Percorrer por autor "Schwarzer, Ralf"
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- FOODLIT-PRO: conceptual and empirical development of the food literacy wheelPublication . Rosas, Raquel Alexandra Ferreira; Pimenta, Filipa; Leal, Isabel Pereira; Schwarzer, RalfPursuing food systems' sustainability is crucial. Given the risk constituted by unhealthy diets, scarce research on food-related adjacent fields, and inconsistency across food literacy conceptualizations, this study aims to explore the constructs' definition and develop a conceptual and empirical framework of food literacy. A quantitative approach was taken on previously obtained qualitative outcomes from 30 interviews with experts from food-related fields. Food literacy was defined by a four-dimension model: Cooking Skills, Preserve and Analyse, Choice and Acquisition, Search and Plan. The framework Food Literacy Wheel integrates the construct definition, food literacy determinants (Internal, External) and influential factors (Nutritional, Psychological, Health, Learning Contexts, Policy, Industry, Sustainability, Social and Cultural). Allowing a broader perspective of food literacy within major food systems, this study contributes with new insights for future instruments and interventions, paving the way to develop/implement food literacy-related multi-sectorial and multilevel actions.
- FOODLIT-tool: Development and validation of the adaptable food literacy tool towards global sustainability within food systemsPublication . Rosas, Raquel; Pimenta, Filipa; Leal, I.; Schwarzer, RalfFacing multiple anthropogenic challenges and considering the current global pandemic, food sustainability is stated as threatened by major intergovernmental agencies. Given the heterogeneity of food systems, the need to enhance food-related behaviours by promoting the acquisition of knowledge and competencies, and the demand to involve stakeholder's diversity, this study aims to develop and validate an instrument that measures food literacy (FL), its determinants and its influential factors in an adult sample. Based on the Food Literacy Wheel (FLW) framework and integrated within the FOODLIT-PRO - Food Literacy Project, this study has three phases and a total of 2406 participants: (1) item development and content validity, (2) instrument development entailing item reduction strategies, factor extraction methodologies (exploratory and confirmatory analyses) and sensitivity testing, with two samples of a total of 1447 adults, and (3) instrument validation encompassing tests of dimensionality (confirmatory factor analysis), reliability (composite reliability) and validity (convergent and discriminant validity), and measure invariance testing, with 959 adults. Concerning statistical and psychometric properties, (1) a pool of 40 items (26 for FL; single items: five for determinants and nine for influential factors) was developed with inductive and deductive methodologies and reflected the FLW, (2) a 5-factor structure was explored, demonstrated acceptable model fit, and good sensitivity indices, and (3) a 5-dimensional reliable structure with 24 items was validated, configural invariance was achieved, and convergent and discriminant validity were significant in most dimensions. The FOODLIT-Tool contributes with an innovative measure of FL in adults that allows for a tailored assessment when approaching food-related issues within global food systems, providing a multidisciplinary tool that can be cross-widely applied to promote food-related behaviour change.
- FOODLIT-trial: protocol of a randomised controlled digital intervention to promote food literacy and sustainability Behaviours in Adults Using the Health Action Process Approach and the behaviour change techniques taxonomy during the COVID-19 pandemicPublication . Rosas, Raquel; Pimenta, Filipa; Leal, Isabel Maria Pereira; Schwarzer, RalfDietary quality and sustainability are central matters to the international community, emphasised by the burden of the COVID-19 pandemic. To promote healthier and more sustainable food-related practices, the protocol of a web-based intervention to enhance adults’ food literacy is presented. The FOODLIT-Trial is a two-arm, parallel, experimental, and single-blinded randomised controlled trial delivered over 11 weeks. Based on the Food Literacy Wheel framework and supported by the Health Action Process Approach (HAPA) and the Behaviour Change Techniques Taxonomy, weekly content with customised behaviour change techniques (experimental group) is hypothesised to be more effective to promote food behaviour change when compared to a single-time and non-customised delivery of food-related international guidelines, with no theoretically informed approaches (comparison group). Primary outcome is food literacy, including food-related knowledge, skills, and behaviours, assessed with the FOODLIT-Tool; a secondary outcome includes psychological mechanisms that efficaciously predict change in participants’ food literacy, measured with HAPA-driven items. Enlisted through online sources, participants will be assessed across five time points (baseline, post-intervention, and 3-, 6-, and 9-month follow-ups, i.e., T0–T4). A randomisation check will be conducted, analyses will follow an intention-to-treat approach, and linear two-level models within- (T0–T4) and between-level (nested in participants) will be computed, together with a longitudinal mediation analysis. If effective, the FOODLIT-Trial will provide for a multidimensional and cost-effective intervention to enable healthier and more sustainable food practices over the long term.
- Handwashing adherence during the COVID-19 pandemic: A longitudinal study based on protection motivation theoryPublication . Szczuka, Zofia; Siwa, Maria; Abraham, Charles; Baban, Adriana; Brooks, Sydney; Cipolletta, Sabrina; Danso, Ebrima; Dombrowski, Stephan U.; Gan, Yiqun; Gaspar, Tania; Gaspar de Matos, Margarida; Griva, Konstadina; Jongenelis, Michelle; Keller, Jan; Knoll, Nina; Ma, Jinjin; Miah, Mohammad Abdul Awal; Morgan, Karen; Peraud, William; Quintard, Bruno; Shah, Vishna; Schenkel, Konstantin; Scholz, Urte; Schwarzer, Ralf; Taut, Diana; Tomaino, Silvia C.M.; Vilchinsky, Noa; Wolf, Hodaya; Luszczynska, Aleksandra; Gaspar, taniaRationale The associations between the number of COVID-19 cases/deaths and subsequent uptake of protective behaviors may reflect cognitive and behavioral responses to threat-relevant information. Objective Applying protection motivation theory (PMT), this study explored whether the number of total COVID-19 cases/deaths and general anxiety were associated with cross-situational handwashing adherence and whether these associations were mediated by PMT-specific self-regulatory cognitions (threat appraisal: perceived vulnerability, perceived illness severity; coping appraisal: self-efficacy, response efficacy, response costs). Method The study (#NCT04367337) was conducted in March–September 2020 among 1256 adults residing in 14 countries. Self-reports on baseline general anxiety levels, handwashing adherence across 12 situations, and PMT-related constructs were collected using an online survey at two points in time, four weeks apart. Values of COVID-19 cases and deaths were retrieved twice for each country (one week prior to the individual data collection). Results Across countries and time, levels of adherence to handwashing guidelines were high. Path analysis indicated that smaller numbers of COVID-19 cases/deaths (Time 0; T0) were related to stronger self-efficacy (T1), which in turn was associated with higher handwashing adherence (T3). Lower general anxiety (T1) was related to better adherence (T3), with this effect mediated by higher response efficacy (T1, T3) and lower response cost (T3). However, higher general anxiety (T1) was related to better adherence via higher illness severity (T1, T3). General anxiety was unrelated to COVID-19 indicators. Conclusions We found a complex pattern of associations between the numbers of COVID-19 cases/deaths, general anxiety, PMT variables, and handwashing adherence at the early stages of the pandemic. Higher general anxiety may enable threat appraisal (perceived illness severity), but it may hinder coping appraisal (response efficacy and response costs). The indicators of the trajectory of the pandemic (i.e., the smaller number of COVID-19 cases) may be indirectly associated with higher handwashing adherence via stronger self-efficacy.
- Luszczynska, A., Szczuka, Z., Abraham, C., Baban, A., Brooks, S., Cipolletta, S., Danso, E., Dombrowski, S. U., Gan, Y., Gaspar, T., De Matos, M. G., Griva, K., Jongenelis, M. I., Keller, J., Knoll, N., Ma, J., Miah, M. a. A., Morgan, K., Peraud, W., . . . Wolf, H. (2021). The interplay between strictness of policies and individuals’ self-regulatory Efforts: Associations with Handwashing During the COVID-19 Pandemic. Annals of Behavioral Medicine, 56(4), 368–380. https://doi.org/10.1093/abm/kaab102Publication . Luszczynska, Aleksandra; Szczuka, Zofia; Abraham, Charles; Baban, Adriana; Brooks, Sydney; Cipolletta, Sabrina; Danso, Ebrima; Dombrowski, Stephan U; Gan, Yiqun; Gaspar, Tania; Gaspar de Matos, Margarida; Griva, Konstadina; Jongenelis, Michelle I; Keller, Jan; Knoll, Nina; Ma, Jinjin; Miah, Mohammad Adbdul Awal; Morgan, Karen; Peraud, William; Quintard, Bruno; Shah, Vishna; Schenkel, Konstantin; Scholz, Urte; Schwarzer, Ralf; Siwa, Maria; Taut, Diana; Tomaino, Silvia C M; Vilchinsky, Noa; Wolf, HodayaPatterns of protective health behaviors, such as handwashing and sanitizing during the COVID-19 pandemic, may be predicted by macro-level variables, such as regulations specified by public health policies. Health behavior patterns may also be predicted by micro-level variables, such as self-regulatory cognitions specified by health behavior models, including the Health Action Process Approach (HAPA).This study explored whether strictness of containment and health policies was related to handwashing adherence and whether such associations were mediated by HAPA-specified self-regulatory cognitions. Methods The study (NCT04367337) was conducted among 1,256 adults from Australia, Canada, China, France, Gambia, Germany, Israel, Italy, Malaysia, Poland, Portugal, Romania, Singapore, and Switzerland. Self-report data on cross-situational handwashing adherence were collected using an online survey at two time points, 4 weeks apart. Values of the index of strictness of containment and health policies, obtained from the Oxford COVID-19 Government Response Tracker database, were retrieved twice for each country (1 week prior to individual data collection). Across countries and time, levels of handwashing adherence and strictness of policies were high. Path analysis indicated that stricter containment and health policies were indirectly related to lower handwashing adherence via lower self-efficacy and self-monitoring. Less strict policies were indirectly related to higher handwashing adherence via higher self-efficacy and self-monitoring Conclusions: When policies are less strict, exposure to the SARS-CoV-2 virus might be higher, triggering more self-regulation and, consequently, more handwashing adherence. Very strict policies may need to be accompanied by enhanced information dissemination or psychosocial interventions to ensure appropriate levels of self-regulation.
- Social robots as health promoting agents: An application of the health action process approach to human-robot interaction at the workplacePublication . Lopes, Sara L.; Ferreira, Aristides I.; Prada, Rui; Schwarzer, RalfABSTRACT: Technological innovations may have the potential to improve health behavior interventions at the workplace. Using a robot as a health communicator who interacts with target individuals may be sometimes superior to human change agents. Embedded in a health behavior theory that accounts for motivational and volitional processes, an innovative study has been designed to explore operating principles and intervention effects in the domains of dietary habits, tobacco consumption, physical inactivity, and stress and anxiety. A single-arm intervention with two assessment points in time, one month apart, has been conducted with 37 employees. They were confronted with a robot that delivered a supportive interaction with the study participants addressing one of the four behavioral domains. The intervention content was pre-tested and inspired by the health action process approach (HAPA). Self-report measures of all social-cognitive constructs such as self-efficacy, outcome expectancies, risk perception, behavioral intentions, and planning were applied. Pre-post comparisons confirmed the assumption of improved scores on motivational and volitional outcome variables. Moreover, mediation analyses underscored the pivotal role of behavioral intentions that translated motivational antecedents into volitional outcomes. The intervention study highlighted the innovative potential that robots may have when it comes to design theory-based health promotion strategies at the workplace. Moreover, results also confirmed basic assumptions of the health action process approach.