Informing and inspiring worldwide action against marine litter - The impact of the Massive Open Online Course (MOOC) on Marine Litter.

Marine litter and plastic pollution are growing environmental problems that require sustainable actions from a wide range of stakeholders. To achieve effective solutions, stakeholders need good knowledge and opportunities for active engagement. To encourage leadership and provide these opportunities, we have developed an action-, and change-oriented Massive Open Online Course (MOOC) on Marine Litter. After five years of running the MOOC, we assessed the impact of the MOOC through an online questionnaire among participants. The results showed significant impact and global reach. Respondents from all over the world reported that they used the information of the MOOC in their careers, volunteer work and personal lives. The results underscore the importance of environmental education to inform and inspire stakeholders. Educational activities should respond to participants' motivations by using activating learning forms and illustrative examples. The MOOC inspired participants to take informed action, engage others, expand their networks, and create real change.

Individual and situational determinants of plastic waste sorting: an experience sampling method study protocol.

BACKGROUND: Plastic waste management is one of the most challenging problems of our time. Until now, only 9% of the produced plastics has been recycled. In order to increase recycling, a behavior change towards sorting of plastic waste is needed. Therefore, the main aim of the study is to gain insight in the individual and situational determinants associated with plastic waste sorting behavior. The Integrated Framework for Encouraging Pro-environmental Behaviour will be used as the theoretical framework. This framework assumes that individual egoistic and hedonic values are negatively related to pro-environmental behaviour, whereas individual biospheric and altruistic values are positively related to pro-environmental behaviour. Situational cues can activate these values, resulting in (non) pro-environmental behaviour. Taking the Integrated Framework for Encouraging Pro-environmental Behaviour into account, this study will test the hypothesized associations between individual and situational determinants and plastic waste sorting behavior, using an ecological momentary assessment approach (Experience Sampling Method, ESM). METHODS: A signal-contingent scheme with semi-random intervals will be used for the ESM questionnaire. Over a period of seven consecutive days, an ESM-based smartphone app will prompt participants ten times a day to fill in a short questionnaire containing questions about situational determinants and plastic waste sorting behaviour. Participants will also complete an online questionnaire before and after the study measuring the individual determinants and plastic waste sorting behaviour. DISCUSSION: ESM has many benefits over traditional surveys, such as improved ecological validity and the possibility to explore temporal relationships. The disadvantages of ESM are mainly related to the burden for the participants and the possibility of reactivity effects. The results will provide insight into the relationship between situational cues, individual values and plastic waste behaviour. The practical implications of the findings of this study can be of interest for policy makers in order to reach plastic waste reduction targets. Furthermore, the situational cues that activate values, which increase or decrease plastic waste sorting, can be targeted in interventions. The results of this study can also be relevant for further research studying and stimulating pro-environmental behaviour in general.

Friend or foe? A qualitative study exploring the relationship of people with obesity and food consumption.

BACKGROUND: Obesity is a major health problem worldwide, and one of its causes is unhealthy eating. A healthy diet should ensure that energy intake (calories) is in balance with energy expenditure, but in this paper a subjective experience of healthy eating will be discussed. Research has revealed many determinants of food consumption, but a more holistic view of food consumption is often overlooked. AIM: The aim was to go beyond identifying determinants of eating by exploring the experience of (healthy) food for people with obesity. METHODS: Semi-structured interviews were conducted with eight patients with obesity. RESULTS: Interpretative phenomenological analysis identified four superordinate themes: ambivalence in the emotional relationship with food, an obesogenic environment where it is less acceptable to society to be obese, an experience of unfairness in the relationship to eating in comparison with other people, and the parental role as an existential motivation to eat healthier. CONCLUSION: The relationship of people with obesity and food is highly complex and personal, and is influenced by the uncontrollability of the social and physical environment. These personal experiences of people with obesity should be taken into account in the psychological treatment of obesity. The current research adds to the mostly motivational determinants discovered with social cognition models, by showing the subjective experience of (healthy) food consumption for people with obesity.

Effects of a diet based on inulin-rich vegetables on gut health and nutritional behavior in healthy humans.

BACKGROUND: Inulin-type fructans (ITFs) are a type of fermentable dietary fiber that can confer beneficial health effects through changes in the gut microbiota. However, their effect on gut sensitivity and nutritional behavior is a matter of debate. OBJECTIVE: We evaluated the impact of consuming ITF-rich vegetables daily on gut microbiota, gastro-intestinal symptoms, and food-related behavior in healthy individuals. METHODS: A single group-design trial was conducted in 26 healthy individuals. During 2 wk, the participants were instructed to adhere to a controlled diet based on ITF-rich vegetables (providing a mean intake of 15 g ITF/d). Three test days were organized: before and after the nutritional intervention and 3 wk after returning to their usual diet. We assessed nutrient intake, food-related behavior, fecal microbiota composition, microbial fermentation, and gastrointestinal symptoms. RESULTS: The major microbial modifications during the intervention were an increased proportion of the Bifidobacterium genus, a decreased level of unclassified Clostridiales, and a tendency to decrease Oxalobacteraceae. These changes were reversed 3 wk after the intervention. The volunteers showed greater satiety, a reduced desire to eat sweet, salty, and fatty food, and a trend to increase hedonic attitudes towards some inulin-rich vegetables. Only flatulence episodes were reported during the dietary intervention, whereas intestinal discomfort, inversely associated with Clostridium cluster IV and Ruminococcus callidus, was improved at the end of the intervention. CONCLUSIONS: A higher consumption of ITF-rich vegetables allows a substantial increase in well-tolerated dietary fiber, which may in turn improve food-related behavior. Moreover, it leads to beneficial modifications of the gut microbiota composition and function. This trial is registered at clinicaltrial.gov as NCT03540550.

Effects of prebiotics on affect and cognition in human intervention studies.

Studies conducted in rodents have highlighted that neurobiological processes underlying cognition and affect are modulated by the gut microbiota. Certain dietary fibers are able to modulate the composition of gut microbiota and are thus considered prebiotics. A review of the impact of the available prebiotic intervention studies in humans on cognition and affect, addressing the potential mediating role of the microbiota, was conducted. PubMed, Scopus, and PsycINFO were selected as sources. Fourteen articles were eligible for narrative synthesis. Data extraction and quality assessment were performed with characteristics established a priori. Some chronic prebiotic interventions (>28 d) improved affect and verbal episodic memory compared with a placebo. Acute prebiotic interventions (<24 h) were more efficient in improving cognitive variables (eg, verbal episodic memory). Future research should measure microbiota using adequate methodologies and recruit patients with dysbiosis, inflammation, or psychopathology. More research is needed to unravel the conditions required to obtain effects on affect and cognition.

A systematic review and meta-analysis of the effectiveness of nudging to increase fruit and vegetable choice.

Background: Nudging refers to interventions that organize the choice architecture in order to alter people's behaviour in a predictable way without forbidding any options or significantly changing their economic incentives. As a strategy to encourage healthy behaviour, nudging can serve as a complement to health education. However, the empirical evidence regarding the effectiveness of nudging as a way to influence food choice remains contradictory. To address this issue, a systematic review and meta-analysis was conducted to test the effects of nudging to encourage people to select more fruit and vegetables. Methods: A systematic literature search was performed on PubMed, Medline, PsycInfo, Cochrane library, Scopus and Google Scholar. After quality assessment, 20 articles (23 studies) were retained for narrative synthesis. Twelve articles (14 studies) contained enough information to calculate effect-sizes for meta-analysis using Comprehensive Meta-analysis software. Results: The meta-analysis shows that nudging interventions that aim to increase fruit and/or vegetable choice/sales/servings have a moderately significant effect (d = 0.30), with the largest effect for altering placement (d = 0.39) and combined nudges (d = 0.28). Conclusion: The results of this review provide an indication of the effectiveness of nudging on fruit and vegetable choice in terms of actual effect-sizes, while also highlighting the problems that must be addressed before more definitive conclusions can be drawn.